Photo courtesy of army.arch

SPORTS: D.C. United takes on Seattle Sounders FC at RFK Stadium tonight in the U.S. Open Cup final. Tickets can still be had here for between $12-$30, plus fees.

MUSIC: For an early start to your evening, head to the Kennedy Center’s Millennium Stage to hear award-winning Brazilian classical guitarist Joao Paulo Figueiro at 6 p.m. for free.

LECTURE: It’s the first Wednesday of the month, so it’s time for G.R.A.S.P. (Green Resources and Sustainable Practice) at the Shirlington Library. Be there at 7 p.m. for a screening of Good Food, a collection of shorts films about food and sustainability, and hear a discussion on “how fresh food can break our addiction to obesity, oil, and waste.”

MUSIC: Pygmy Lush, Des Ark and Little Gold make up a compellingly eclectic bill at the Black Cat backstage. 9 p.m., $8.

THEATER: Got a tween in your life? Make their night by scoring some last minute tickets to Disney’s High School Musical at Wolf Trap. Tickets range from $25 to $70. 8 pm.