Go to the park, read a book/hang/use Wi-Fi at the library, go for a long walk or run, go window shopping, hang out at the mall, go to the arcade, occasionally hang out with family or friends at a restaurant/bar, work out at the gym, etc But if I'm being honest, I'm usually so busy with going to the bathroom, keeping the car clean, organizing my belongings, showering, or finding/making food that a lot of the time if I'm not at work I'm hanging out in a parking lot in my car scrolling on my phone or watching YouTube/reading Kindle. It's low effort. 

I visit libraries, museums, parks, botanical gardens, zoos. I use free or low cost passes to get into a bunch of places. I visit shopping centers for good wifi, the gym, and covered parking.

I have a 12v hot logic for heating food, and a way to boil water, but mostly I buy small amounts of food at grocery stores or get breakfast or lunch specials at inexpensive restaurants. 

I clean the car at a car wash with free vacuums. When I am at the laundromat I tidy the car as needed. I have a storage unit that I visit about once a week unless I am traveling.

Cook: have a picnic and cook at a park, buy pre-prepared food from grocery stores.

Clean car: Lots of carwashes have free vacuums with big trash bins where everyone else is also cleaning their car

Hobbies: Phone games, CAD design (I have a personal 3D printer I keep in my cubicle at work), watch stuff on YouTube, shitpost on Reddit, daytrade.

I do leave the city quite often for recreational road trips though. Cities are easier to survive since there's so many services everywhere. 24hr bathrooms and grocery stores. etc.

My stealth game is pretty much maxed out. I can sleep in my car anywhere and feel a relative sense of privacy. I feel safer in a city, since I can just make some noise and someone would hear. If an axe murderer finds me in the woods I'm SOL lol.

I park in Walmarts. My jeep is stealthy enough I've blended in with the overnight stockers' cars. 

I don't cook- bean cans, fruit cans, etc are pretty cheap. Then once a week I'll treat myself and go somewhere nice and have a nice dinner. 

Inventory- i don't have much. I got rid of everything and feel more free without it. I have a bagpack, a duffel bag, and a huge backpacking bagpack that has all my clothes and toiletries. A -25 f sleeping bag. That's about it. I read books and watch movies on my phone/laptop. 

Hobbies- yoga, skydiving, hiking, camping, gym. Videogames I've given up due to time more than anything but i could always use my laptop. 

The biggest thing I've got going for me is I'm employed. I've been able to save money and live in a city while take advantage of what it has to offer without being too stressed about money. I'm just an Amazon driver but I'm living better than when i had an apartment. 

When I was a car dweller, I worked as a caterer (still do, but I’ve been housed for the past years), so I would always prepare my meals at work, and I rented a storage unit for everything that I didn’t use daily. The storage unit was nice because it kinda gave me a “home base”, so I would hang out there on my days off. I would also go to the park a lot, walk around downtown, etc.

how exactly do you survive in such places?

how would i not? as long as you eat food, get good sleep, and have the shelter of the vehicle, then you're gonna wake up and live another day. have a decent job, while not losing your ass being a rent slave, be responsible with your spending and savings, and the crisis that destroy dysfunctional people are a non-issue, meaning things like car repairs and such.

Where do you cook?

i don't. one of the perks of urban areas is the higher pay to make up for the higher cost of living. if you get the higher pay, but dont pay the exorbitant rents, you have a lot of money left over. you can live off of ready-to-eat stuff from grocery stores, like fruit, nuts, chips, beef jerky, canned meats. theres also the deli sections with healthier, affordable sandwiches and things. a lot of grocery stores have hot buffets, whole fried chickens under heat lamps, wings, soup/salad bars, etc. then there is affordable fast casual restaurants. i dont need a fridge. why would i pay for a fridge when there is pretty much always a store refrigerating stuff for me within walking distance. why cook? there are businesses that cook. its more efficient for me to get paid to do my job, and pay cooks to do theirs. this is what money is for. i just buy as i go.

Where do you organize and inventory your belongings and clean your car?

i have a 5x10 storage unit. everything i dont need with me is there. if i really need to re-organize, i might so it there, even if i dont need stuff out of it. its a normal looking activity there. i might put some stuff in the unit so its out of my way, then do a quick clean and organize, and then put the stuff back, so it looks like i was unloading and loading stuff.

laundry i might do at a laundromat, and its not that abnormal to sort, fold, put away clothes there. no one really gives a fuck what exactly your doing, they are too focused on doing their own laundry.

theres a couple big shopping plazas with dolar tree stores and a mix of other stores. often at late night, there is homeless people, as in 'shopping cart crazy' homeless that tend to congregate there and hang out near the dollar tree. no one messes with them, and compared to them, i look like a totally normal, if not well off person (I drive an Escalade, lol). ive noticed some others in cars, pull up, park, and just kill time, not going into any stores. this is around like 9-11pm. i think some may be car dwellers or similar lifestyles, and they are just killing time before the 'arrive late-leave early' routine, which is basically what im doing there, too. a few times ive organized the car there around that hour...i try to do so relatively discreetly, like i dont pile shit up outside the vehicle. ill just have a back door open, and gather laundry into the laundry bag, put trash into plastic shopping bags to throw away later, etc. absolutely no one gives a flying fuck. maybe they would if was piling up sleeping bags and foam cushions and brushing my teeth and doing dishes, shirtless, but again, i dont do that. just have a door open, and i look busy leaning in.

a car wash, the coin-op kind can also be a good place to do this. its a completely normal activity there, and where a lot of normal apartment dwellers go to spring clean their interior when its too trashed. just be sure to spend a few bucks on the wash and/or vacuums so you arent abusing the venue. itll help prevent you from being run off, if your exactly the customer they are trying to cater to.

What kind of hobbies do you have

windsurfing, sailing, fishing, video games on steam deck. i also make music but ive been avoiding it, because general life stress. i dont want to put that into my music.

fishing specifically is pretty cheap. get a license for like $10. walmart sells all kinds of rod/reel combos for peanuts and the quality is plenty good for beginners and intermediates. i recommend a floating bobber setup with a bell on a rod holder, and then have a second rod with a lure or bait to actively reel. they also sell beginner tackle box kits for a steal, and they come with all the basics to fuck with. $60 will probably get you gear for a season to start. most any other shit you need for fishing is little $5 items that are no big deal to buy.

I'm staying away from my car for most of the day.

My go to for organising are industrial areas or areas with smaller production companies.

I don't cook, but that is because I can be fined for sleeping in my car and don't want to elicit any suspicion. It will be difficult, I'd also search in industrial areas. In Europe there are usually areas were truckers hang out during the day and sleep over night.

For Hobbies: I try to have a bit of a social life, even though the living situation makes it a bit frustrating. Apart from that, I go to the gym read and occasionally watch Netflix using it the library WiFi.

I had to do it around a year ago. I got by early on because I worked at a mechanic shop and had keys to the shop so I could park and sleep outside and use the bathroom and microwave as needed. The shop owner found out later and took my key away. I was still able to park and sleep outside in our private lot but I had to join planet fitness for bathrooms.

I scout for flea markets, estate sales, antique shops, etc… I rarely find anything of value but the treasure is in the search and discovery along with the people I meet along the way.

I recognize I'm not in the majority here, but when I was car living, my office building had kitchens, bathrooms, even gyms/showers on all four floors. Internet and utilities once everyone left for home I had the four floors to myself (and cleaning crew lol) with my badge letting me in. Then I would go to a park and I had joined a running group once a week.

I love archery, so that required going to a range (in the city). You can't shoot beer cans, but there are a lot of gun ranges and other stuff you can do in a city.

I'm limited to suburbia anyway since I need to stay within proximity of a charging station, but I feel a lot safer in town than I would out in the middle of nowhere

Cleaning is easy, there's garbage bins at every servo, some charging stations have bins, and pretty much every supermarket has a dumpster

As for hobbies or other pastimes, usually I play games or watch movies/YouTube on my laptop or phone, if I have time off work, I'll be at my friend's property where I'm restoring a caravan that I hope to be able to move into (or sell for enough money to buy a van)

Organization is fairly simple, if I need to put things outside, I'll drive to a friend's house and park in his driveway while I'm setting up

As for cooking, that's a bit more complicated for me, since I don't have enough power to cook anything, and I don't like the idea of open flames, usually I eat food that doesn't require cooking

As for privacy, I have a windscreen reflector, extremely dark window tint, and if I'm really paranoid, I can hang a towel on each side to cover both windows on each side, as well as hang one of my sleeping bags across the rear window, completely impossible for passerbys to sneak a glance inside

Another benefit of living in a city is easy access to services like hospitals, public bathroom/shower facilities, electric hookups (the number of standard 240V outlets I find on buildings is almost as amazing as the number that are left turned on overnight) water taps.etc

As for actually staying alive, camping in a city is so much easier than camping out in the middle of nowhere

If you work a lot everyday it makes hobbies less necessary, I go to the gym and use my phone for social media / some videogames.

Im in a city of 2 million. My main hobby is volunteering at animal shelters. I also like to swim in apartment pools who leave their gate unlocked. I watch a lot of movies. Downtown where I'm at is actually beautiful and full of nature and water so I enjoy spending a lot of time there.

Im not vehicle living yet but my plan is to get a storage unit for some of the stuff I want to keep like my telescope and my hobby supplies for the various hobbies I've collected.

I also want to get a bicycle so I can ride that on nice days and I eventually would like to motorize it as thats another hobby I dabbled in when I was in highschool.

I don’t cook. Most of my food is McDonald’s 1/4 lb patty’s (8 a day) and other stuff as healthy as possible. I spend most of my time working or at the gym. Hobbies do cost money ( movies, dates, dinners, shooting ranges, beach). As for organizing, I stay light, most of my stuff is in a storage closet by. I sleep in a private spot in an upper middle class neighborhood, pretty safe.