This is the moulin de la galette where people went to dance instead of watching dancers like in the moulin rouge.
It was depicted by some impressionists like Renoir, right painting, and also by Picasso, left.
"An artist, under pain of oblivion, must have confidence in himself, and listen only to his real master: Nature."August Renoir
"Painting is a blind man's profession. He paints not what he sees, but what he feels, what he tells himself about what he has seen."Pablo Picasso
These quotations explain a little the difference of both painters.