We have a lovely, quiet yoga class in a very small studio. Mats are very close together but we work around it. It's very calm, very peaceful except for the 'breathers' - and they are invariably men. Honestly, today I very nearly asked the class 'breather' if he was ok. He was puffing like a donkey through a megaphone! It was so loud it made it difficult to focus on my own breathing and not fall into his rhythm. My friend said the same thing. Sometimes it was even difficult to hear our wonderful, softly-spoken teacher.
Worse than that, I nearly laughed out loud at a couple of points - I thought he was going to whinny. 
Is it because they're trying to assert their presence, need an inhaler or are they pretending to be all manly and gym-like?
I just wish they would BE QUIET!
Thanks goodenss there's only ever been 1 of them at a time in the class, otherwise they'd have the windows out.