Travel back to the days of Donkey Kong, Pac-Man and Asteroids for the Indie Arcade at the Smithsonian American Art Museum, when the Smithsonian and American University’s Game Lab fill the Kogod Courtyard with vintage arcade machines, in addition to some new independent games. Future video game designers can check out game-building workshops, while sci-fi fans new and old will appreciate the chance to play two movie tie-ins from the early 1980s: “Tron” and “Star Wars.” The best part? You don’t even need quarters. The event runs from 1 to 7 p.m., and admission is free.