OK...gym's have a higher % of dicks than elsewhere. Then going to the gym makes them more of a dick as their ego grows. I am one of those dicks. That is why I can point it out.
Go to the gym regular and you will realise it is full of arrogant dicks or people that train so they can be deemed as hard.
I think its pretty undeniable, that gyms, on average, have a higher concentration of ***** than the average place. That isn't to say that everyone who goes to gyms is a ****, or even that the majority are, but there is a distinct increase in people acting "hard" and "laddish" in a gym compared to the average place.