ANYONE RECALL A FRENCH FILM WITH A SIMILAR THEME?

About ten years ago UK TV screened a French movie also set in a Parisian porn cinema during the course of a single night. This film was more of a quirky light comedy. The film was set in the foyer of a multi-screen cinema and you heard, but never saw, what was going on behind the curtains. Basically the action consisted of the bored young female cashier chatting to the regular customers, who all seem to be unthreatening, sympathetic characters.
Can anyone supply the name of this film, or did I imagine it?