Marcel Carné's Hôtel du Nord (1938), a perfect example of 1930s French film noir (or poetic realism). A young couple decide to spend their last night on Earth in a cheap hotel in Paris.
A superb movie that works on both an intellectual and emotional level.
My review: https://dfordoom-movieramblings.blogspot.com/2010/03/hotel-du-nord-1938.html