Jazz in the Garden is a local institution.
Every Friday of each summer for about eight weeks (starting May 20th and going through to July 22nd), Sculpture Garden at the National Gallery of Art hosts an evening of live music. Most evenings, the musicians play jazz (as the name of the event suggests), however, some weeks the scheduled bands play Afro-Cuban, bluegrass, and other styles as well.
When you get there, you can feel free to put down a blanket and sit on the grass, find one of the seating areas scattered around the venue, or stand near the stage. Attendees can also bring their own food inside. If you can’t or don’t want to bring food or drinks with you, there are vendors inside the Sculpture Garden that sell snacks, beer, soda, and a few other things.
While this event is free, you do have to register in advance.