Around 8:00 last night, an a cappella group showed up outside the Clarendon Metro station and began singing for a small crowd of bystanders.
We don’t know who they are or why they were there, but the above video shows them performing a pretty impressive rendition of Adele’s Rolling in the Deep. If you’re familiar with the group, please let us know in the comments.
Update at 2:20 p.m. — The group has been identified by commenters as the “Noctonals.”
Hat tip to @anuckols