Have you just arrived at a new place and don't know where to find the cheapest drinks? With BoozeMap, you can see places that other users added and their respective drinks (beer, wine or spirit) and prices. If you want, you can filter the cheapest one, increase the radius and get the directions to a desired place.
On the other hand, you can contribute by adding other places you know have good prices, so other users can then benefit from it. The login is made via Facebook or Google+, so you don't waste too much time signing up.