What is the name of this film?

It's about this French Russian roulette racket in Paris, and basically all the contestants are made to wear numbers, and stand in a circle around a light bulb. They are each given a gun and obviously only load one bullet into the barrel, and spin it. Soon as the light comes on, they are supposed to pull the trigger of the gun which is to the head of the guy infront of him, but behind him is also a gun to his head. It's black and white also, but not an old film.