Forget Pee Interest and posting doilies or whatever you do there. Here's Untappd
http://untappd.com/ a social check-in network like Foursquare or FB check-in but for beer drinkers.
Okay despite the fact that crooks can tell when you are away from home, cops can tell when you are driving home under the influence, it is still a kinda cool network if you are into interesting beers. Nice discovery lists like trending beers
and where people are finding what, plus where your friends are drinking.
Marketing-wise it could be a boon to small brew pubs, micro breweries, restaurants and pubs that feature fine beers. Not sure about uses beyond that.