I, as an FOH manager, have been guilty of the AC fake out. I live in the deep south, with more humidity than any place you've been in this country. (Although, I feel for the one earlier from Ponchatrain, but you still fall short...) I break out the keys, unlock the box, and mess with the AC. However, I leave it exactly where it is at, because it's never cold in my restaurant. People sometimes feel that it is, but I never have the air set lower than 72 degrees, and it never gets that low, because the AC units are 15 years old and can't hold that temperature when it is 102 degrees outside. I will however, turn off a fan or something else if I have a customer that is too cold... Do you honestly think that you can control the temp in a busy, large dining room? If you stick around for 4 hours, maybe you will notice a difference, in as big of a restaurant that I run... Maybe not, as the guest count changes the temperature way more than the AC units... If I can keep a vent from blowing on someone, turn off an overhead fan, possibly even move the table, I will do it to make them happy. But messing with the AC does nothing.... As for it being too hot in a restaurant, where I live, you can't do much about it. Either your restaurant is under powered or it's just too damn hot. I guarantee you that if it could be cooler, the staff would already have done something about it. They sweat more than you....