Edited for your approval

[Monolithent]

One of the places I am working now has very specific rules about what gets played. No Rap, Hip Hop, R & B, Hard Metal, Slow Country, slow songs, or extreme bad language on just my DJ stuff. I can still let people sing anything they want and it kind of helps with the people who don't like the stuff that I can still play. It's a pain because everyone comes up and asks if I have this or that (which I usually do) but I can't play it. Actually had a guy want to fight over it one night. Kept telling him that it isn't my decision but he wouldn't hear it.
The reason it started the problem was that the owner backed off of his rules one time for a pretty girl and the guy heard it.

Moral of the story. If you're gonna limit your selections make sure the bar staff understands what it might mean to make special exceptions to the rules. And that the staff understands they must stick to their guns on the rules.