From the documentary: THE SPIRIT MOVES 1950’S
The Cakewalk was not exactly a swing dance but it was probably the first African-American dance to become popular with white audiences going back to the late 19th century. I believe the dancers are Pepsi Bethel and Esther Washington.
I wonder what's the name of the music they're dancing to. It's so cool.
Music is The Entertainer, by New England conservatory Ragtime Ensemble.