My cousin was a bouncer in NYC during the 90s when it was not all yuppies and hipster, and instead, gangbangers, druggies, and just tough guys.
He quit because he said he sick and tired of people telling him, they gonna kill him.
He apparently had to use hand to hand to defend himself quite a bit. One story he told me, when he was bouncing at an explosive and athletic crowd catering club. An up and coming rap artists was throwing a party, and his producer and people behind him invite either the bloods or crips or both to attend the party, hoping they will start beef so the rapper will look like a legit bad arse.
Naturally these ruffians start up, and my cousin has to protect the interest of the club owners, and must step inbetween, and try and break it all up.
My cousin is a cool guy and I look up to him.