This reminds me of an event not so long ago..
Here goes.. I was working behind the bar in a club in town one night, and whilst stopping to load up the dishwasher to clean a tray of glasses these two lads at the bar (about 24 / 25) shout "Oi, you gonna serve us or what?".
I turned around sharp thinking they were talking to another one of the bar staff, and to my amusment they were talking to me

... I said "not if you're gonna be rude then no, besides i'm not serving - this is the glass collection point, go up the bar and that girl will serve you".
Ok, from this point on I knew it was gonna escalate.. they say "so you won't serve us?" and i reply "no, sorry but im busy and i'm not serving at the moment; my till is closed".. after 2 minutes of "you can't be behind the bar if you're not going to serve me" I started getting annoyed.
FINALLY, back on subject I get the "what you look at?" from the second lad.. I said "nothing" ..."don't stare at me he says, i will knock you out".. Ok, I am not scared of these guys in the slightest, and i know from 9
+ years of karate (fought for Wales

) that i didn't need to be scared of these two chopsy customers, so i say "look mate, let me get on with my job" (and then turn around)
Right, this is where it got ugly.. they start shouting abuse at me this time, calling me a faggot etc etc, and i say "look im not serving you **** off", one of them says "hahaha what you gonna do?" so.. i say "come here..." as he leant over the bar i belted him right on the chin. Out cold. I look at the other guy "you're next" and by this point I her
ar the radio going "fight upstairs".. bouncers came and threw them guys out.
Moral of the story.. don't let them get to you, it leads to people getting hurt (one way or another).. needless to say I had the last laugh.