Staff/Security at UK music venues or arenas. What is the worst crowds you have to deal with?

This feels like the right place to tell the story of a smallish boxing match I worked at a few years ago. (It was a temp job that the venue hired for and I'm not into boxing so I have no idea if this is how it always goes but it was the first and only one I have ever worked). We were told before the shift started that there would be a comedian before the match and some of his jokes might be on the adult side, and that after the match there would be "dancers" that came out to the tables. All of us, though young were still over the age of 18 and figured we're all adults, we can deal with it. During the so-called comedian everything was as expected, dickheads already drunk before the match started. Once it began I noticed several gammon headed looking people brave enough to sniff coke from the table. I told other staff but the venue didn't care about it. It was awful but honestly as I expected it to be. Then the dancers came out. By this point the men were gurning(sp?) their jaws off their heads while the women stripped off.. I don't care about people doing that sort of thing at all, but these women were rough looking. Very much looked like it was a bargain for the venue. They were kicking drinks off the table while I had to clean up around them. By this point I was getting a bit overwhelmed with everything and asked to go for my break. When I come back, almost all of the staff has been pulled aside and asked if anyone wants to go home if they feel uncomfortable after an incident. Even though I just had my break I figured I'd go home because I was truly done, and I'd try find out what happened. Turns out while I was on break some of the dancers had started performing sex acts, on the men and each other. Two women started pleasing each other on one of the tables and squirted a lot of fluids onto a guy watching.. and a staff member who was collecting glasses nearby. Honestly glad I missed that mess and I vowed I'd stay away from anything boxing after that. Wildest shift I've ever worked.