Money-Clutching Survivors

I recently saw a movie late at night and can't remember much except that I enjoyed it when it was on.

A group of people were locked in a house with the premise that the survivor through the night would be able to walk out the door with a bag full of money. At the end of the movie, the survivor walks out the door into a hallway full of other people who have survived the same game, and all are fearfully clutching their money.

Does anyone know the name of this movie? It is driving me nuts. Thanks!