From the BID, more details
on the holiday music planned for the Navy Yard Metro entrance this week, and it's three performances over three days, not just one on one day. On Wednesday, Dec. 12, from 11:30 am to 1:00 pm, the a cappella group Reverb will be performing; Patty Reese will perform on Thursday, Dec. 13, from 4 to 5:30 pm, and on Friday, Dec. 14, Reverb will be back from 8 to 9 am. This is sponsored by the BID, WMATA, and the DC Commission on Fine Arts. UPDATE:
Here's the release from last Friday
(that I overlooked, grrrrrr) on the Metroperforms! program. One thing in it that might be worth noting, just to be on the safe side: "Program participants are not permitted to sell merchandise, nor ask for money from the public while performing."