Yes, I would have the air conditioners switched on. The two odd people are not normal people and they need to learn to bear the problems with the air conditioner working rather than let the 50 other people suffer. Try working your thoughts on such a situation to keep the air conditioners off and you will get 100 kicks on your backside (2 x 50) from the workers. You don't "know" workers and base your comments on your 'philosophical' style of thinking.