Leonard Harper was a producer, stager, and choreographer in New York City during the Harlem Renaissance in the 1920's and 1930's. Harper's works spanned the worlds of Vaudeville , Cabaret , Burlesque and Broadway musical comedy. As a dancer, choreographer and studio owner, he coached many of the country's leading performers, including Ruby Keller . Fred Astaire and Adele Astaire , came by the studio twice, and the Marx Brothers went for lessons. He produced floor shows and theatrical revues both uptown in Harlem and downtown on Broadway's Great White Way. In his Times Square dance studio he trained the Busby Berkeley dancers, and Fred's sister Adele Astaire . He co-directed and staged the ensemble segments of The Exile and the short film Darktown Revue with Oscar Micheaux . Harper staged for Broadway Hot Chocolates ...