@ericanicolee I went to a boxing gym in the South that was like this for a few years. no AC or heat. The summer was not great, but the whole front of the building did open up with a garage door, and the back could be opened a bit too--there were big fans, circulation. I mean, my clothes would be 100% soaked tho. In the winter, you often had to wear two pairs of socks, long sleeves, etc., because it was so cold. It never bothered me, I guess because actual sunshine bothers me more than heat, but dealing with whatever was also sort of the culture? I currently work out in my garage with no AC and it's pretty damn hot, but again, I can open the door.
I guess the real question is: For what you are
paying to belong to this gym, does it seem like AC ought to be paid for and covered? Are you missing value for what you're giving?
(I didn't feel that way at my hot gym because I got so much incredible coaching and training out of it otherwise, but I can definitely see other scenarios where I'd feel I was getting ripped off if there wasn't AC.)