I have to say, I'm not much for playing in the heat. My studio in Rhode Island had window air conditioning in the main dungeon room. But, it was an old mill building and didn't cool well on abnormally hot days. My concern was someone getting light headed or passing out during a demanding session. One of my all time favorite sessions was on a pontoon boat in a lake that, at that time, had plenty of private coves. It was a hot day but we were on and in the water.