The Ballroom Scene from "I Don't Want to be a Man" - 1918
Ernst Lubitsch frequently inserted comical dance scenes into his films, and this is no exception.
The premise is that a young lady, unhappy with her lot, impersonates a man. She then finds out it's not all it's cracked up to be.
This film provides a wonderful snapshot of Ragtime era Fox Trot/One Step.