1. Use it to spark some healthy competition. Thanks to the abundance of badges offered by Foursquare, it's easier than ever to turn the service into a fun little game. Since they're constantly adding more badges, you can presumably play it forever.
2. Use it to explore your area. Foursquare isn't just about tracking whereabouts or who is mayor of what venue. The service actually allows people to write tips, or mini reviews, of places that they check into. Poke around for a bit and you might just find a surprisingly good new date spot just down the block.
3. Use it to become mayor of your special place. Has your S.O. ever teased you for being a techie? Prove that geeks can pull off romance by becoming mayor and mayor-ess of the place that hold sentimental value for both of you; for example, the restaurant where you had your first date.
4. Check out your crush's venues. Some people call it stalking. We call it research. If your crush uses Foursquare, check out her recent check-ins after asking her out so that you have a better idea of how to plan what will inevitably be a magical evening.
Do you use Foursquare? How has social media affected your love life?