Gene Kelly and Mitzi Gaynor Sizzle in a Diner

Another great dancer in classic movies, Mitzi Gaynor, here partners with Gene Kelly in Les Girls (1957). What the movie, as a whole, lacks in zip and sparkle is regained in musical numbers like this one. Here Miss Gaynor portrays an harassed waitress at a diner and Mr. Kelly is the boorish customer. Of course, they end up enamored with each other.

Exit question: If she's trying to get rid of the gang, why would she shake her tail feathers in front of them? That might induce them to stay, one would think.