There's an App for that

Untappd
Former TU Delft post doc Dan Farley confesses that Untappd is one of the most used apps on his phone. “It’s like Foursquare for beers,” he says. Untappd allows users to check in to beers they are drinking and works with other services, like Foursquare, to allow you to check into locations as well. “I really like craft beer, so I like to keep track of what I’ve had and what I thought about it. I work at a beer shop on Sundays and I use my notes to advise customers,” he goes on. With the app, you can follow your friends to see what they are drinking. “You can also see where they are drinking,” he adds “so it’s easy to see who is hanging out at the different pubs.” The app also allows you to follow breweries and rate beers.