In GTA: San Andreas and based on the Casino Royale of Las Vegas;
the Royal Casino can be found on The Strip in Las Venturas. It is
next to The Camel's Toe and Caligula's Palace. Although CJ cannot
access the Royal Casino, there is a multiplayer icon beneath the
roof.
The Royal Casino is the location where CJ has to try and save
Madd Dogg from falling off the roof to his death.