i think living social/groupon are great ways to find new things to do in DC. also, just wander. pick a metro stop, find 1 or 2 things that are interesting near by, and just wander around and see what you see. (this is how i like to visit new cities) join a team, club, or group. if you’re single, online dating is great too. almost no one is “from” DC, we’re almost all transplants. welcome!