Right Photo: McCann WorldGroup Chairman-CEO John Dooner welcomed party goers aboard for an affair that included a deck gallery display of a collection of art from McCann offices around the world. (Larger photo)

Right Photo: The vessel includes an open air champagne bar, a library, massage room, beauty shop, helicopter pad and 1,500 square feet of sunbathing space. The mosaic area in this photo is the bottom of the swimming pool that rises to become a dance floor when needed. (Larger photo)

Right Photo: Aristotle Onassis owned the craft from 1954 to 1975 and used it as his seagoing home. During that period the vessel regularly hosted world celebrities such as John F. Kennedy, Sir Winston Churchill, Marilyn Monroe, Grace Kelly, Frank Sinatra and Egypt's King Farouk. (Larger photo)

There is also a central grand spiral staircase made of onyx with silver handrails and 18 staterooms, each named for a Greek island. (Larger photo)

Right Photo: Near the McCann art display are John Tylee of 'Campaign' magazine; Dee Lynam, vessel owner; Ilene and Johnathan Cranin, worldwide creative director of McCann; and Reuben Hendell of MRM. (Larger photo)