A long time ago, a guy that tought me all the basics of pool said, "You can take a guy's money, but never take his pride."
This has served me well over the years although, I have found myself in sticky situations more than once. I grew up playing in local back woods bars. Mostly small weekly 8-ball tournaments. Me and my good friend would go on what we called "the bar tour". Each tournament was worth a couple hundred with the calcutta. We split everything. There were 3-4 a week. That was good money when you are in school.
Anyhow, a quick story. Like Jay said, cheap 8 ball gets you in more trouble than anything else. Me and my buddy were at one of these tournaments one night. I happen to win and the guy I beat in the finals played OK but not good by most people's standards. He was a really big "pulp wood hauler" (if your from the south, you know the type) that had way too much to drink. He asked me after the tournament if I wanted to play 20$ a game. Against my better judgement and some urging from my friend, I said OK. I broke the balls and the cue ball was rolling toward the corner and I put my hand in and caught it. He said "YOU JUST LOST. You cant touch the cue ball". So he grabbed the money off the light and the argument ensued. I should have just let him keep it but my bad temper took over (I was sober. I dont drink while playing). He bowed up and was ready to fight. The whole bar was looking at us, owner included. They loved a good bar fight so nobody was going to stop it. The guy brought his cue back like a bat. At that very moment fight vs. flight took over and I hit him with everything I had. He crumbled and I started kicking him in and around the head. I knew if he got up, I was done for. For some reason, one of the guys at the bar jumped in and started wrestling with the guy after he came to. I had already made my way to the door. I came back the next week and they said that the guy was banned and that it got really ugly after I left. He had jumped in his car after they threw him out and rammed a couple other vehicles in the parking lot. I never saw that guy again thank God.