As everyone knows, I am not a movie critic. My guess is that Fred Astaire & Ginger Rogers had their wonderful movies and danced beautifully.
However, I don't remember them.
I do remember "Saturday Night Fever" and watching John Travolta put on a dancing clinic. I recall leaving the theater "dumb founded"with Travolta's incredible performance.
It wasn't much of a story. It was a great dancing movie!
So this is my choice for "dancing movie"!