I am not a movie expert. I have never seen that movie. I usually enjoy what people call 'crappy shallow movies', like the matrix, lord of the rings or die hard.
However I really feel lousy at the moment and there's nobody helping me, so I felt like helping you by trying to search the movie you need. Hope you don't mind my incompetentness.
And I think I found it.
The movie, I believe, is called
'The Discreet Charm of the Bourgeoisie' (1972). IMDB link:
Charme discret de la bourgeoisie, Le. The director is Luis Buñuel, you'll find any other info on the link given above. Sorry if it's not B/W, but I still think it's what you need.