Those who need to brush up on their moves should book a private dance lesson at Elmayer in the 1st District, a famous dance school established in 1919.

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The ship's 27 dining options also include ethnic restaurants like a Brazilian churrascaria and Shanghai's Noodle Bar, along with the Manhattan Room, styled like a private supper club with dance floor.

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Private and group lessons are available in dance halls and advertised throughout the city.

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Most dance revenue is for dances in private lounges.

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She owns two businesses: a dance company and an online art gallery, Uprise Art, that also organizes private events.

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This year, for instance, an obscure DJ from Lichtenstein, Al Walser, is nominated for best dance recording next to heavyweights such as Avicii and Skrillex, after he made lobbying efforts on a private website for Academy members.

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