PARTY: Get a jump start on Cinco de Mayo and learn to salsa at Artisphere’s celebration. At 7:30 take a salsa class with Eileen Torres, then dance for the rest of the night to the music of Rudy Gonzalez y su Lokura until 11 PM. Buy tickets ($15) at the Artisphere’s Web site.
MUSIC: Tonight’s offering at the Kennedy Center’s Millennium Stage is the quartet Pièces de Résistance. They specialize in classical selections that were deemed “unworthy” by the Nazi regime and otherwise might be lost. 6 PM; free.