Royal Bay Yacht Club is a private marina in Miami where Alexander Macauley held his yacht.
Dexter in the Dark
According to Dexter, Zander held had his yacht at the most exclusive marina of Coconut Grove, the Royal Bay Yacht Club. Dexter refers to the marina as a the perfect place for the terminally rich. Dexter planned to investigate the boat as he was sure that was the transportation used by Zander to dispose of the bodies, however as the security on the marina was too high, even to a 24 hours extent, Dexter dropped the idea.
However Dexter hacked the marina's computer records filed by the dockmaster and found evidence on Zander's activities which proved him and his Dark Passenger that Zander was worthy of their dark justice.