Got into lots of scraps in high school. Reasons? Basketball, bullying, you name it. All sorts of shallow crap.
Mostly not by choice too, but dragged into because my friends were already trading punches with some other guys (But fistfights only, no weapons ever). Now that I think back it all seems so stupid, but I got to develop bonds with these guys (who have now all mellowed down, married and are either working white collar jobs or engaged in business) that will last a lifetime.
Got into 1, and only 1 fight in college. The smallest kid in my ROTC batch was bullied and beaten up by a bunch of frat boys, so our upperclassmen decided that we must avenge our "brudda".
It was a whole gang rumble with dozens of people on both sides and us armed with baseball bats and stuff. I got one whack in, threw a garbage can over my opponent and then ran like hell! No way I'm risking my life (and my future) for THIS insanity.
After graduating, I'm proud to say I've never been involved in any more fights. The first sign of trouble in a bar, I'm outta there. Ever been to a bar in Manila during the 80s and 90s? They have gun racks out front for people to deposit their assault rifles.
Even then, you can never be sure if them off-duty cops and soldiers aren't keeping a pistol tucked away in their belt, and might start shooting if sufficiently agitated. So, I figure much better to be a chicken than be dead.