Lady Luck (1946)

Mary now runs a bookstore in L.A. with her grandfather, whose past gambling excesses have left her hating everything about the pastime. Unfortunately she falls for Larry, who makes his living in this very line of work. He vows to change but going to Las Vegas to get married may not be the best choice for them. Indeed, Mary's forefathers all had gambling in their blood and if she does ever get to try the tables anything could happen.