Have to disagree here. The ballet was a revelation in its day, and is still one of the greatest examples of a film ballet, second only to the dramatic arc achieved in Powell and Pressburger's The Red Shoes. The dramatic shifts in the music are expertly realized by Minnelli and Kelly's keen artistry in their respective fields of planning. And Kelly's Chocolat is a tour de force.I have to admit I hate that ballet too. It’s my lease favorite part of the movie. I can’t listen to Gershwin’s piece anymore without visualizing those awful dated cheesy dance moves. Worst yet, they cut the music arbitrarily.
The minor tragedy for That's Entertainment! is that it omitted much of the ballet in favor of a Cole's Notes glimpse that left a good deal of its artistry and brilliance on the cutting room floor. That said, it caps off That's Entertainment! quite nicely and is, by far, the best finale from all 3 That's Entertainment! movies.
I think the most proletariat ballet ever put on film is The Broadway Melody Ballet from Singin' in the Rain'. But the one that most succinctly summarizes and embodies MGM's motto, 'Ars Gratia Artis' (or art for art's sake) is the Gershwin finale from An American in Paris.