my favorites ones are.
Ocean's Eleven
Runner Runner
21
King Of Gamblers
King of Gamblers ? I am yet to check it.
I loved Casino Royale but I have not considered it a gambling movie. It was more of an action movie rather it was an gambling based movie. There are few scenes that have been taken in casino but nothing related to gambling. The only thing that I learn was having confidence and trying to read others mind.