Psychological persuasion oftentimes worked well for me as a doorman and bouncer back in the day. I'd tell guys, "Listen, man, the manager just called the cops, so you can either walk out of here on your own steam before they arrive, or you can wait for their assistance. Just thought you might appreciate knowing that they're already on their way over here." Other times I'd tell them, "You know, if the cops arrest you here tonight, it'll be Monday afternoon before you get out of jail. Is it really worth spending your entire weekend in jail for this? If I were you, man, I'd haul ass out of here while I still could."
I was initially surprised to see how many guys immediately headed for the door unassisted, even guys who were damned near blind drunk, and without the coercion of anyone putting hands on them in any way, and thus without any fight at all. Many of them would even thank me for the head's up as they left the building.
In those instances where such tactics didn't work, I would usually try to keep the guy talking to me until the cops arrived, and let them take it from there. However, if the guy put hands on me or took a swing at me, I would move to knock his ass out as fast as possible, hopefully appearing to others that more than simple luck had enabled me to put the guy down and out that quickly. This usually discouraged others from joining the fray, and I could then haul the SOB outside. Shock value is sometimes worth its weight in gold in such situations.
In this way, fighting was held to a minimum, furniture and glassware rarely got broken, and if the guy regained consciousness with a bad attitude before the cops showed up, at least he was already out of the club, and any further fighting that might occur would take place outdoors, not in the club. Ah, the good old days!
But then one weekend, I took time off to attend a friend's wedding out of town. That weekend, some drunk got into a very heated argument with the bartender near closing time. He proceeded to pull a pistol out his pocket, shot the bartender and two of the bouncers who were attempting to intervene, killing the bartender on the spot. I gave my notice when I heard what had happened, knowing that it could have been me, and have never worked in clubs since then. I realized that my life is worth more to me than any amount of money anyone is willing to pay me as a doorman or a bouncer.
Doc Stier