i train late at night - the last hour it's open when the 4 powerlifters come in.
they blast some rammstein metal over the speakers that makes my head hurt. they train with the kid that works at night, so it's okay I guess.
They curse, wrestle, argue, and they often split a 24 pack in the parking lot afterwards.
I don't mind them - i'm doing cardio at that time and they never go near those machines.