Cruise Lines Want a New Kind of Passenger: Millennials

But booking twentysomethings on floating malls won't be easy

Cruise lines have weathered some rough seas in the past few years. Well-publicized food incidents (the latest afflicting Royal Caribbean this January) together with true disasters like the Costa Concordia wreck have conspired to put a dent in the hull of a historically vigorous industry. But the cruise lines are trying to set a new course—not by changing their destinations, but their demographics.