[header] How to drink two beers before somebody drinks two shots [title] Find somebody to bet against. [step] The most important thing you'll need for this trick is a competitor who is a good sport. This can potentially be anyone in the bar, but a friend is probably the best choice. 
However, if you see strangers who look like they can take a joke, go for it. [substeps] Avoid bothering bikers, surly-looking regulars, or anyone else who looks like they won't react well to losing a bet.