Paul Michael has an article over at WiseBread.com on his top five ways to hustle a free drink. All of these involve making a bet with someone for a free drink, and of course the trick to winning every time. What's really great is that you can watch a video of each hustle so you know exactly what to do, rather than having to rely on someone's drawings or description.
The bets are probably best made with friends, or maybe to impress a girl or two. You can watch the videos HERE.