Open Nightly (1980)

Husband and wife, Albert and Lulu, run a brothel, Le Chat Rose, which is struggling financially. Albert and Lulu get a banker to give them a loan by letting him win the services of the girls at games of cards and think they can rejuvenate the brothel by bringing in their daughter, Julie, who has been fostered out to a couple who pretend to be priest and nun. They defeat debt collectors by photographing them with Fifi.