Ladies House of Pleasure(1976)

Original title: Hommes de joie pour femmes vicieuses

A lovely summer day in Paris. Roger and Martine are on their way to work. "Work" is a euphemism because Martine is a prostitute in Pigalle. She is saving money to buy the house of her dreams in the country. Her husband Roger "works" for the same goal, but in a brothel for women. There, duchesses rub elbows with businesswomen, militant members of women's lib and other female pleasure-seekers.