Man walks into a bar and declares: "Drinks for the house, and one for the bartender!
When it came time to pay, he had no money. The bartender roughed him up and kicked him into the alley.
Next week, same thing "Drinks for the house, and one for the bartender." The bartender surmised that no one would be stupid enough to try that same thing twice, and that the should be able to recoup the first night's losses, so he poured drinks for everyone and one for himself...and sure enough, the guy has no money, so the bartender beat him within an inch of his life and threw him out into the alley.
About a month later, same scenario...the guy comes in, looks at the bartender, and says "Drinks for the house...but none for the bartender, it makes him too damn mean!"