Haha, I've worked as one as well. But I can see how it would work.
There's a difference between pouring drinks for a single person who you're chatting up, and throwing another jack into the shot glass, pouring it into a glass and filling it to the top with coke. Then repeating that as fast as you can for the entire night.
It reminds me more of those times when the bar is slow, and it's near closing, and so you decide to experiment with the rest of the bar/cook staff.