The Bain de Diane and the Plage des Grottes (a nude beach) are reserved for naturists; nudity is formally obligatory there. Being nude is allowed (and expected) everywhere on the public area of the island, except in the immediate vicinity of the harbour. In the harbour, it is formally necessary to wear what the French jokingly call , often a pareo or a string. In conformance with the relaxed atmosphere of the island, this rule is not really enforced, but generally well observed. Inside restaurants outside the village centre, some clothing, although often flimsy, is often worn but toplessness (for women and men) is quite accepted there and "le minimum" considered sufficient attire; on the outside terraces, nudity is common, especially at lunchtime. At least two restaurants, La Fourmi and Heliotel, actively encourage customers to be nude, even at dinner.