I used to go to a meat head gym in Warrington that was full of doormen. It was by far the best gym I've ever been to. Despite their scary looks, the blokes were all friendly and would always give advice to the less experienced lads. In my experience it's the knobs in the free weights area of the...
Another thing that gets me is blokes having a naked piss in the changing room toilets. I don't know why, but standing there at the urinals wearing nothing except a pair of flip flops and having a piss is just wrong.
Don't get me started on actual weight room etiquette. It pisses me off so much...