Talk About Exclusive: Paris’ hippest new hotel has only one room. An installation piece by Swiss artists Sabina Lang and Daniel Baumann, the Seventies-style Hotel Everland has just opened on the roof of the Palais de Tokyo and is accessible to paying guests only, through next November. On Sunday I convinced a staffer to sneak me in, to see if it merits the nightly room rate (up to $643). It does, with groovy floor-to-celing op-art carpet and a glass wall directly overlooking the Seine and the Eiffel Tower. There’s no curtain to draw, but nobody seems to mind: the hotel, which can be reserved exactly two months in advance, for one night only, sells out instantly each morning.