Never been in a bar fight, twice I’ve stepped in on domestics when things looked like they might get out of hand, one guy threw a few but I’m 6’3" and 220 (he was about 5’6") so I was able to tap him in the throat a few times to stop him connecting. His girlfriend made him apologise to me 
I have had a concrete block thrown through the window of a bus at me. The guy was screaming at me to get off the bus, but with odds of 5 to 1 and one of them with a block, drunk as I was, I decided it probably wouldn’t be a good idea.
My baby bro is a different story, one of his friends was on the receiving end of a good kicking from a bunch of lads. A week later my bro and 8 of his buddys were in the pub. My bro and the guy who got beat up were at the bar on their own getting a beer when 2 of the guys who did the kicking walked in.
- they didn’t realise they were up against 9 guys
- my bro wasn’t looking so they thought they could take him out of the action
- they didn’t know my brother has a thick skull
One of them hit my bro in the back of the head with a bottle. Now we’re not talking a bud bottle but a good old heavy 1 pint cider bottle, the reusable kind.
The bro brushed the broken glass out of his hair, turned around and said “Right. Who the fuck did that?”
The two guys truned to run, found 7 guys coming from one direction, 3 doormen coming form the other. The doormen saved them 
The same baby bro was out again another night with some buddys. A guy next to them at the bar started giving the barman shit and eventually broke a glass off the bar and threatened the barman. Before anyone could react, one of the bros buddys who does martial arts had the guy rolled up in a ball and was holding his face over the broken glass telling him how to behave. Que doormen, lots of thanks and free pints all round.
Roll on a week. The bro, same buddys, same bar, stopped on the door.
“Whats the problem?”
“You’re barred”
“We’re barred? What the fuck! This guys saved your barmans ass last week”
“I know, but he’s a fucking pshyco! You’re all barred.”
Doormen the world over all seem to be the same…