Every March I drive to Miami Beach to attend the annual Cruise Shipping conference and trade show, and every year I am struck anew by the number of entities connected to cruising: not just shipbuilders (Fincantieri, Meyer Werft) and the ever-widening circle of ports (a booth one year for the English Lake District), but manufacturers of everything from pianos to lasers to waste management systems, caterers (who fill a section of the convention center floor with their seaworthy foodstuffs), interior design firms, clothiers, talent agencies, photographic studios, and special services (“U.S. immigration explained”). The assemblage attests to the seriousness of a business built on fun.