Gross Gaming Revenue from Premium Players (A premium player is a person who opens a deposit account with the casino operator with a minimum amount of $100,000)
As mentioned above, Casino is based on Nicholas Pileggi's nonfiction book about Frank Lefty Rosenthal, and what led Pileggi to write about him was a 1980 report about a domestic argument between Rosenthal and his wife, Geri McGee (played in Casino by Sharon Stone).