2. There are areas of the bar you should aim for... and parts you should avoid.
The waitstaff area, where the waiters and waitresses tuck into the bar to get drinks for tables and process checks, should be avoided at all costs -- it's a high-traffic zone and is going to be the most difficult place to push up to the bar.
The bartenders' station, where most of the drinks are made, is where you're going to want to aim for -- the bartenders are always going there, and your chances of getting the attention of one of them are much higher. Also, the area around the register is a sure bet as well.
3. Ultimately, remain calm and don't take your frustration out on the bar staff.
George says: "Never speak to a bartender when you haven't made eye contact. Don't yell drinks at them when their head is down. No waving, snapping, or 'yo's. Ultimately, assess the situation, the bartender’s stress level, and ask yourself, 'If I was in their shoes, how could I get my attention?'"
Other than that, it's a game of knowing the areas of the bar where you can get service (i.e. don't try to order from behind a seated couple that's making out on top of the bar), easing forward towards the countertop, and good old-fashioned common sense. You've got that... right?
And don't forget to tip well -- the bartender will definitely remember you the next time you push past those couples to get a drink.
Adam Lapetina is a Food/Drink staff writer for Thrillist, and wonders if anyone has ever tried crowdsurfing to the front of a bar. Read his musings at @adamlapetina.