Excerpt from the 1941 film Hellzapoppin’. The musicians are Slim Gaillard and Slam Stewart (with the Slim & Slam Allstars). The dancers are the most famous swing dance troupe in history, Whitey’s Lindy Hoppers, from Harlem, New York. The dancing couples are:

William Downes & Francis ‘Mickey’ Jones
Billy Ricker & Norma Miller
Al Minns & Willa Mae Ricker
Frankie Manning & Ann Johnson