Years ago in my Dads bar I was bouncing, a little teeny dude was whipping rear on the pool table, a guy lost and wanted to beat his head in the teeny dude gets behind me grabbing my shirt pushing me at the big dude. I was laffing so hard at this, the big guy circling me trying to hit the teeny guy who is trying to keep me in front of him. I made em play the game over, teeny guy won again, big guy left in a huff.
Bar fights are usually over some stupid event like losing at pool. or looking at a guys lady too hard, had to break up a lot of em, next day all involved (cept me) act like they knew it too.
Never in my life seen a huge brawl like the movies tho.
Had a guy claim he "cleared" bars, but when he hit me upside my head I found he was easy to put down
never met a tough drunk yet.