"Gimme a pint, nigger."
The black bartender says "Don't say that word to me. What happened if I said something offensive like that to you?"
The Irishman says, "I don't know, but we can find out by switching places."
So they switch places.
The black guy goes or and then comes back in and says "Hey you honkey mick, gimme a beer!"
The Irishman says, "Sorry mate. We don't serve niggers here."