9. Not Knowing What You Want
Opting for charade-like tactics to flag a bartender down is absurd enough, but don’t get their attention and have the audacity to not know what you want. In addition, after you've finally remembered why you harassed the bartender in the first place, make sure you order all of your drinks at once. Bartenders can’t stand it when they've already made one, and then you ask for four more.