No, we're not talking about genies of the magic variety. Instead, cruise ship genies are more like personal staff who are there for one thing and one thing only: to make your dreams come true. These genies can do everything from bringing you a personal breakfast in bed to snagging you tickets to sold-out concerts. You can basically ask your genie to do whatever, as long as it relates to your trip.
However, this service is paid for, and not every package comes with a genie. It's also worth researching what others have asked their genies to do in order to get some ideas about how to use the service.