Everybody’s plugged in. Learn from the experts at Politico and Facebook how political campaigns are spreading their message and getting votes at “Going Viral: How Campaigns Are Using Social Media.” The event is at George Washington University’s Jack Morton Auditorium; 6:30 to 7:30. Free.
Catch a showing of two of summer’s biggest blockbusters at Arlington Cinema ’N' Draft House. For $1, see Julia Roberts travel the world in Eat, Pray, Love at 7 or let Leonardo DiCaprio invade your dreams with Inception at 9:50. Buy tickets at the door.