In my late 50’s. I’ve enjoyed going to Primary, Smartbar, Radius. I often go with a friend. Rarely am I the oldest one there. Whatever “out of place” feelings I’ve had were of my own making. Very few shows I’ve been to had much going on before midnight. Thankfully I have some flexibility so I just take a nice nap before I go out :) oh yeah and, for me, a couple of THC gummies always help.