Molly's Game - She runs a high stakes poker game for prominent stars and mafia. She then finds herself in trouble after the FBI finds interest in her.
The Gambler - a professor is addicted to gambling and finds himself in trouble with his enemies.
Mississippi Grind - a man believes his new found friend is a lucky charm when it comes to gambling.
These are only a few off hand. Since I have a great interest in problem gambling prevention, awareness and addiction, I often look for movies of interest. Enjoy!