 The casino scenes were shot at the Riviera between 1:00 am and 4:am  so as not to get in the way of the real gamblers. Although the  casino didnt want the shoot to interrupt its business, that didnt  prevent it from trying to lure more punters inside by putting up a  large banner that said, "Robert De Niro (qv),  Sharon Stone (I) (qv), and Joe Pesci (qv) Filming the New Movie  Casino Inside!"