I'm at a bar that I used to date the bartender, I don't feel like tipping the bartender.
Why wouldn't you tip the bartender?
The bartender used to flirt with other customers. I found that inappropriate and unpleasant
It's mean to not tip them over such reasons. You should always tip bartender's no matter what.
I just find what he did so disturbing.
I get that you have issues with the way that he approaches people. You shouldn't be so judgmental, it may be just jealously that you're going through. It's always appropriate to tip bartenders unless they give you poor service