Lay the Favorite (2012)

Beth, a former private dancer with hopes of becoming a Las Vegas cocktail waitress, finds an unexpected way into the city’s gambling world when she meets Dink, a professional sports bettor who runs a sports book. Her sharp head for numbers quickly makes her valuable, and as their chemistry grows, so does the tension with Dink’s wife, Tulip, who is far from pleased by Beth’s sudden place in their lives.