There is practically no indication that behind an elegant patisserie and gelato counter on Main Street lies a small Art Deco restaurant with the atmosphere of a private supper club. It is speakeasy-discreet, lushly carpeted, gently lit, pretty expensive, and the food is out of the ordinary. Among the dishes are beef carpaccio, lobster salad, ricotta ravioli with butter and deep-fried sage leaves, babete with mussels, cockles, and basil, risotto, and veal piccatine in white wine sauce. All the pastas are made from scratch. The coffee bar, from 10 a.m., serves espresso and a remarkable cappuccino. A few outdoor tables available in good weather. Oh, yes: Don't forget those pastries.