Busboys & Poets (2021 14th St. NW) hosts Spring Sizzle: Cool Sounds, Food & Fun for a Cause in the Langston Room. Highlights include a live soul/jazz/house performance by critically acclaimed Tamara Wellons; and a silent auction of signed local sports memorabilia and tickets for shows. Proceeds will support EDGEWORKS Dance Theater. Reservations are required -- get tickets here. 6:30 p.m.; single ticket $75; couples ticket $100.
Absorb some culture from people who are possibly both younger and more talented than you (oh, the burn) when the Julliard School's LK String Quartet plays the Millennium Stage at the Kennedy Center (2700 F St. NW). 6 p.m.; free.
Still grieving over the untimely demise of HBO's Screen on the Green? Try to find a way to start moving on -- tonight at Crystal Screen (18th and Bell streets, Arlington, VA, in the courtyard across from the Crystal City Metro station). The outdoor film fest airs a superhero movie every Monday evening -- tonight's is "Spider-Man 3." Sundown; free.