Four you.

2010 was a huge year for Foursquare, and 2011 appears to be looking up, too. As location-based services surge in popularity, the original check-in service has evolved from a simple way to share your location with friends to a full social media experience. Here, five cool uses for Foursquare — if you're not on the service yet, perhaps one of these fun facts will convince you!

1. Discovering city trends and attitudesFoursquare engineers recently determined the rudest cities based on the amount of profanity used as people checked into certain locations.
2. Discovering new food Foursquare recently announced a special Mario Batali badge that users receive after checking into one of his restaurants. But besides the badge, you'll also get special food recommendations from the chef himself. I always check Foursquare tips from friends if I'm eating at a new place; chances are someone will have left a note detailing a favorite dish.
3. Creating a personal history log The site Foursquare&7Years will email you with a daily reminder of what you were up to a year ago. You can also access your own history through the site and app, which is fun to do if you're feeling nostalgic.
4. Upping your credibility Whether it's geek cred you're after or something else, Foursquare does indulge a little bit of nepotism, especially when you're checking into somewhere especially awesome, like a hot restaurant or concert.
5. Having a laugh While I wouldn't necessarily encourage checking into one of these places— strip clubs and bathrooms make funny check-ins when you're just playing around with friends.

via Geek Sugar