It's so incredibly lame when someone comes into my bar, acts like a jackass and then when they complain to me about how I gave them attitude, pull the "I'm a bartender" card. If these people really were bartenders they would:
1-Not act like a jackass in the first place.
2-Order fast and easy drinks to make if the bar looks busy. In other words, not be high maintenance.
3-Be patient.
4-Not approach the bar until they knew exactly what they wanted to order and were ready to order it.
5-Not start off the transaction with "I'm sorry to be a pain in the ass but..."
When people pull this "I'm a bartender..." crap on me, I not only question if they truly are a bartender, but I can't help but wonder, what in the hell kind of bar do they actually work at?
I have worked in a variety of bars during my bartending career and I know better than to pull this kind of crap on anyone else. To me, announcing that you're a bartender in a situation where you are clearly the one who is throwing attitude and acting like a jackass just screams "douche".
