Originally Posted by Bear Cub

Rum and vodka would be the two front runners. The vodka can be straight or mixed, and the rum you can mix with just about anything. I wouldn't get too carried away on the quality/price, because there is about a 99.9% chance that everyone else is going to help themselves to it as well.

In all honesty, it doesn't really matter, as they won't even be able to taste it about two hours into the night anyways.