Bartenders are there to serve you drinks, process your end-of-the-night tab and tell you what's on the draft during Friday happy hour. They aren't there to save your seat, read your mind, provide change for a $20 that isn't being used to buy cocktails or keep an eye on your glass, which is almost always teetering on the edge of the bar. Check out our list of the worst customer behaviors on record; we can pretty much guarantee you're guilty of at least one of them.

What it looks like: "Hey, can you watch my coat and bag while I run to the bathroom? And my drink? Also, this seat. Thanks!"

Bartenders are not there to watch your stuff, save your seat or (if you really want to get specific) do anything other than bartend. If you can't carry your personal belongings with you to the bathroom or don't trust your friends to supervise your un-roofied drink, then maybe find new people to hang out with. This is not your bartender's problem.

What it looks like: You, being an idiot and leaving your martini glass on the edge of the bar or within elbow-swinging range

Accidents happen. But the same accident doesn't usually happen twice in the same 30-minute period. If you can't control your flailing elbows or don't understand the physics that separate your beverage from the floor, you probably don't need that tenth drink anyway.

What it looks like: "Can I have a ten, a five and five ones? The drinks are on his tab - I just wanna play Hall & Oates on the jukebox."

It's one thing to ask for change when you're in the middle of a transaction. It's quite another to flag down a bartender who is busy earning their keep through tips so you can ask for change. 

What it looks like: "I like fruity drinks, but hate anything frozen. Beer is out of the question. Have you ever heard of something called St. Germaine? I kind of like that."

If you're in a bar known for their skilled mixologists, you can definitely consult a bartender for suggestions. But, if you're at a crowded Irish pub yelling your likes and dislikes across the bar, you're going to wait a looooong time for your drink. 

What it looks like: It's crowded, you've waited 30 seconds too long--and now you're jumping all over the place to non-verbally communicate your lack of a drink

If the bar is crowded, the bartender knows that. Actually, she probably knows it better than you do, since she's the one doing all the work. She sees you. Just make eye contact and wait to be served; snapping, yelling or doing anything else to show that you're still waiting for your Bud Light is going to have the opposite effect.