I was once persuaded to provide p.a. for and to compere a pre-match 'party' for about 700 at a United away game. The singsong was going along dandily til some fuckin drunken eejit - infused with the spirit of fraternalism and 'spirits' in general - decided to sing 'You'll Never Walk Alone'. Cue an avalanche of cans (thank fuck no glasses or bottles were given out).
10 minutes later some clown decided to sing 'Who's that lying n the carpet?'. In fairness he was booed off and hit with several cans - at least one of which appeared full (though I don't know if it was beer or piss).
It was touch and go (and decidedly uneasy) when the strippers were on... but then on came the 'Comedian' who strated lecturing the crowd about their manners. He might have gotten away with it too, if he wasn't a dead ringer for Ian Rush. As the first cans began to rain down amidst chants of 'You Scouse bastard' to the outraged 'comedican' who insisted on telling them 'well that's where you're wrong see, cos I'm from bloody birmingham"... I was sure my gear would soon be in smithereens so me and the fella who was organising the do just picked him up, carried him off stage and fucked him out the back door - just ahead of the posse of irate and drunken knuckle-draggers.