"Hey nigga!" he yells to the black bartender "get me a beer!"

The bartender walks over. "What did you say to me?"

"You heard me the first time nigga, I said get me a beer!"

So the black bartender says "You know, that ain't right man. How'd you like it if I walked in and treated you like that?"

So, they agree to trade places and test the black bartenders theory.

The black guy walks in, sits down and shouts "Hey Chink, get me a drink"

The Chinese bartender walks over and says "I'm sorry, we don't server nigga's in here"