When it comes to 'Sit Down You're Rockin' The Boat' or 'Luck Be A Lady', languidly sung by McGregor with Summer Strallen), you sense the first nighters exhilarated and intrigued. Yet only Rob Ashford's choreographic set-pieces capture a vintage vivacity and repressed sexual ardour. Down in the New York sewers, where the hoods play their crap game, they dance up an impressive storm, too.