Rock Paper Scissors Tournament: Just registering for this rockin' 100-person tournament will get you access to an all-you-can-eat buffet and tickets to that evening's Baysox game against the Erie Seawolves. The winner gets skybox rental, an autographed ball, a chance to throw the opening pitch at the game, and, most excitingly, a bobble-head. Throwdown starts at 6 p.m.
Prince George's Stadium
4101 N.E. Crain Highway
Bowie, MD 20716
So Cow: Indie Irish pop! Show starts at 9 p.m. and tickets are $7.
915 U St. NW
Washington, DC 20001
GI Film Festival:The third annual film fest celebrates the successes and sacrifices of the American military through film. Highlights include screenings of Tom Cruise's "Valkyrie" and "Taking Chance," starring Kevin Bacon, and a reception featuring Sen. John McCain and comedian Kelsey Grammar. Tickets to regular screenings are $10.
Carnegie Institution of Washington
1530 P St. NW
Washington, DC 20005