Last time in I was in one was about 8 months ago. For some reason these two arrogant meat-head types had a big problem with one of my closest friends. They always tried to corner him alone and scare him, and one day I saw it happening while I was walking with another of our friends. He's not small or easily pushed around but there were three of them and they were backing him into walls, etc. I yelled something and they turned around, words were exchanged, and pretty quickly there was a lot of shoving. Soon enough it was a 6 person fist fight. Nothing too ugly happened, as I've mentioned I have Aikido training (a martial art that teaches purely defensive and relatively peaceful submissions/ends to a conflict). I subdued one of them pretty quickly, giving a 3 vs 2 advantage which made it a lot easier for me to choke them out with out causing any significant damage. In the end one of my friends had a cut above his eyebrow and a bloody lip, the other a black eye, and myself two really jammed fingers. The other guys had their scrapes and bruises as well, but it could have been a lot worse.
And the last time I saw one was 2 months ago. Two dumbasses were fighting over something stupid, I think it was ice cream. They were slapping at each other like children until one got a decent punch, and broke the other's nose, ending the fight.