Well I saw this movand about at least 3-5 years ago and I really want to watch it again but I can't remember the actors the names or half of the story line all I remember is that it was something about gambling and action and I think I'm not sure the title involved a number I'm not sure If it was 13 but it was a number But the guy lived In a college dorm or somewhere and when he gambled he won a lot but I remember he put the money in the roof of the place and some guys got in while he was out and when he came back the money was gone. I think the game was poker, I don't know and I'm not sure if I rented the movie in this place called block buster or in redbox. Anyone know,thanks.

'21' (2008) ?