It is a place where one's instinct is to give a reason for being there--"Oh, you see, I'm here because--" Failing that, you are faintly suspect, because this corner of Europe does not draw people; rather, it accepts them without too many inconvenient questions--live and let live. Routes cross here--people bound for private cliniques or tuberculosis resorts in the mountains, people who are no longer persona grata in Italy or France. And if that were all-Yet on a gala night at the Hotel des Trois Mondes a new arrival would scarcely detect the current beneath the surface. Watching the dancing there would be a gallery of Englishwomen of a certain age, with neckbands, dyed hair and faces powdered pinkish gray; a gallery of American women of a certain age, with snowy-white transformations, black dresses and lips of cherry red. And most of them with their eyes swinging right or left from time to time to rest upon the ubiquitous Fifi. The entire hotel had been made aware that Fifi had reached the age of eighteen that night.