Gyms are still useful for saunas, which have big benefits for health, mood, and gaining muscle. I'm going to try to build my own though. I don't like working out in a pick-up joint and it's so incredibly weird how even personal trainers there have fat bellies sticking out. A world of difference between that and the boxing gym I went to 20 years ago in high school. That was WAY better - the ex-army drill instructor who owned it would loudly shitlord you if you put on even a tiny amount of weight over spring break and it was full of extremely dedicated members. The only gym I might go back to is a gym where amateur and pro athletes go to like that one. That gym was dirt cheap too.