Back in late 70s my job at a public ice skating rink & hockey rink was basically in stopping fights or forceing people out that were the trouble makers. Remember at this time I was coach of the best B.C. Interior Amateur Wrestling Team so yes I was not the one to tangle with. Plus I was doing a lot in Judo.
Still brawls in the washrooms were Mens Washroom being basically only one it two yrs though Womens Washroom was continual with cat fights far, far to often. Like I would see two young girls around 8 to 10 yrs of age toddleing onto their firgure skates into the washroom to be comming out frightened. All due to the cat fights of women in their later teens to early 20s. THAT was all I needed to move in THIS TIME without warnings but to actually grab one & march her right out of the rink. Being that time of year parents did not dare complain & the RCMP office was just across from the rink & not once did they tell me to easy off the muscle.
So besides being a sort of janitor & Zamboni driver I was also the sort of accepted bouncer though no one used said word though given warning about possible fights by one of the others & would move in again, to said area, to calm things down or give a warning.