Diffusion restaurants, like fashion labels, have become an important part of maximising brand value. Sure, Ducasse has a brace of triple-Michelin-starred restaurants, but his pick-and-mix eaterie Spoon+ offers a less expensive, less formal, yet Ducasse-branded experience. If Nobu in New York is full, then try Nobu Next Door, its less formal sibling; in London you can shun the noise and fast table turnover of Nobu Park Lane for a takeaway from Ubon in Canary Wharf.