To do or not to do air conditioning

The summer is still here - although in the last two days I had serious doubts about it - and, as in any normal corner of the world, you need, when you go inside, more fresh air. Mostly when you go at cinema - a tip for English speaking expats in Berlin CineStar Sony is probably the only place in town where you will always find movies in English - at all the seats are taken, you need to breath freely and not to faint before the movie is over. Or in the bus, in the middle of the day, in the touristic area, all you need is just a little bit of air conditioning. 

Two years ago, at my gym, I was about to faint and asked inocently one of the trainers: WHY we can't open the air conditioner, at least for 30 minutes? The answer: is unhealthy. Which might be true but after sweating for one hour I don't think you will benefit of too much healthiness, unless you are a trained sauna fan. 

I know also the "cultural explanation" - we, here, we are not like the Americans and their air condition everywhere - and maybe there are any other explanations of various colours and philosophical directions. I don't want too much talks and meditation. Only 2-3 degrees less of air conditioning.