Avoiding Fights

I've never been in a fight at a bar but always assumed that I'd be able to hold my own. Maybe I wouldn't take on the whole place, but I could at least knock down the guy holding the pool cue and throw a barstool that would take out the bouncer. Then I went to a bar in Florida that had a punching bag with sensors that measure the power of your hit. In spite of sharing a name with a fictional boxer, my punch is weak and my aim is worse. Initially I thought that putting a punching bag in a bar was an idiotic idea since it would lead to fights. Now I realize that having a machine in a bar that tells you how weak of a punch you can land prevents more fights than it causes.