My favorite pick for 2013 thus far is Pickwick from Seattle, http://www.pickwickmusic.com/. I'm posting this in advance cause they'll be at DC9 on April 27, and it's a small venue and may sell out. They guys channel a Motown sound that kicks out the jams, and are supporting their latest release "Can't Talk Medicine" that came out last week (March 12). You'll be fortunate to see them for a mere $10 at the door or $12 online from Ticket Alternative, http://www.ticketalternative.com.
Pickwick is sharing the stage with Basia Bulat, who are splitting their current tour between supporting Pickwick and Nick Cave. Check them out at http://basiabulat.com/.
Doors are at 9:00, and the show starts at 10:00. I can meet at Brixton before the show around 9:00, http://brixtondc.com/