This is not from a feature-length movie, it's a "Soundie" from 1942. Soundies were short film clips played on a loop for ten cents a piece on a video jukebox called a "Panoram." Basically, very early music videos. The dance instructor/choreographer was Leroy Broomfield (1902-1971). He was originally from Omaha, Nebraska, but studied and performed in L.A., China and New York. He produced revues at the Ubangi Club in Harlem in the late 1930s. This routine is likely to be a mix of nightclub acts. According to Mark Cantor's 2023 book on Soundies, the dancers were: Elizabeth Spratley, Arthur Murray, Lester "Sleepy" Williams, Elizabeth "Chinkie" Grimes, Johnny Thomas, Henry Roberts, possibly Leroy Broomfield himself and possibly Lucille Battle.