Howdy, thatonekid - first off, welcome, and where you from in CA? I've lived in Laguna, LA, and Arcata, myself. I moved here from LA after college (UCLA) 2 years ago. How's life adjusting to the east coast?
Living in Alexandria means you can ride into DC fairly easy on the Highway 1 bridge sidewalk.
There's lots of fixed riders in DC and dcfixed.com is a good way of meeting up for rides. If you're in town, be sure to hit up the
Bike Rack, a new and very fixed-friendly shop right around the corner from my pad.