Charlie Walton's frequently stunning lighting design allows for a strong opening. The cast stands bathed in blue and green shades evoking the sea, so that a moment of calm is established before the colours become brasher and brighter for the commotion of the dance floor. The pace is set by the confident, if slightly brittle, performance of a dance host whose mercenary sadism is so strong that he hauls a collapsed pregnant dancer off the floor so she can whimper a song into the micro-phone. There is too much of a contrast, however, between his pushy patter and the over-leisurely delivery of the cast's scripted sardonic whinges - leading to the overall sense that the production should get itself to an assertiveness class.