Not to be too much of a smart-ass or anything, but really.
"The movie sometimes assumes viewers know the details of these luminous lives, so it may be helpful to understand some of the relationships that made Paris in that era both a dream and often something less [...] In 'Midnight in Paris' Gil suggests to Buñuel that he make a film about a dinner party gone haywire. Buñuel, of course, took up the suggestion. The film was 'The Discreet Charm of the Bourgeoisie,' released in 1972."—"Decoding Woody Allen's 'Midnight in Paris,'" Joseph Berger, May 28, 2011
One has to love that "of course." Gil's suggestion, incidentally, is a scenario wherein the guests at a dinner party find that for some reason they cannot leave it.
El ángel exterminador (The Exterminating Angel), Luis Buñuel, 1962.
The Discreet Charm of the Bourgeoisie features a leitmotif in which several different dinner/cocktail parties are invariably interrupted, in ways that make them impossible to resume.