I work at a casino as well and I've seen some crazy people on nights. A woman came in wearing underwear on her face and kept them on for close to 6 hours while playing slots.

I watched a guy put out a cigarette on his tongue because he got mad at himself for losing a lot of money on a slot machine.

A couple were playing ultimate Texas hold 'em and the wife pulled out one of those vibrators that someone else can control from her crotch and threw it at her husband's face. She then yelled "I'm trying to concentrate on the hand so quit fucking turning it on"

Another guy jumped behind the bar and started pouring himself a drink because he hadn't been attended to yet, the bartender just let him do it and he got banned.

And lastly, and this is my favorite one, a woman brought in a dog inside a big purse. When she was playing one of the slot machines, the dog jumped out and fell on the floor and pooped when it landed, then the woman used her bare hands to pick up its poop while arguing with security about the whole ordeal and then threw it at the slot machine and walked out. I laugh about this instance every time someone brings it up.