The Tangiers was 'created' at the Landmark Hotel-Casino, which had been closed since 1990. At this time, the Maxim was still in operation and gaming continued to be so until 1999. The Maxim was renovated and reopened as the Westin Casurina (1996)'.
Your site states: 'The scenes outside the fictional Tangiers casino were shot in front of the then-closed Maxim casino.