In the world of restaurants, there is a difference between a hot spot and an institution. Restaurateurs in New York City are in constant competition to achieve the latter. There are many elements to consider, but among the most important are longevity and devoted regulars. A common quality across institutions: distinctive interior design. One of the best-designed new restaurants on the scene right now is Casino, which opened this past December in Chinatown. The glamorous French-Italian Riviera-style restaurant, owned by Aisa Blue Shelley, was designed by Camilla Deterre, 32, a model and interior designer. While many of the references for the space are high-concept, they are counterbalanced by bespoke, intimate touches, such as hand-sewn curtains and plaster arches, both made by Deterre herself. The pair prefers the designs to appear homemade and create an atmosphere of ease. Sophistication is not sacrificed. —Hayley J. Clark