"Have your card or cash in hand and visible so I know that you're ready to order. If you're looking over your shoulder and still trying to get your friend's drink order then I move along to the next customer."

"Do not try to get our attention. At all. We know you're there, and we know the order in which people got to the bar. We know you want something. That's why you're at the bar. Do not wave. Do not yell."

"Honestly, the best method is to be obviously ready to order without asking a ton of annoying questions. Don't worry, if they make eye contact, they'll get to you. If you wanted to not wait for a drink, go to 7-11."