DDs gym has A/C and tons of huge fans. It was 110 degrees outside today and for the past week, so that is a good thing. The viewing area doesn't have air though, so we freeze in the winter and are dying in the summer. At least our kids aren't too bad. The air isn't super cold, but I can see why, it would cost a fortune. Her old gym didn't have air and those girls were sweatin' like crazy.