At the epicenter of the "hot" new Walnut Street restaurants is the Striped Bass. At 15th and Walnut, in an Art Deco building, it formerly housed a brokerage firm. The interior was softened by restaurant designer Marguerite Rodgers. The ceilings soar, and the floor to ceiling windows create wonderful light as well as naturally intimate areas. A giant striped bass adorns the open-air kitchen. Owner Neil Stein has also set the tone for a stylish bar area where the well-dressed patrons come to devour martinis and champagne as Billie Holiday and Natalie Cole are heard in the background. The menu, of course, is all fish, and only the finest ingredients make their way into each dish. Start with the raw bar that features oysters from both coasts, shrimp, clams, and Maine lobster. The menu also offers house-smoked salmon, Petrossian caviars, and daily ceviches. Chef Terence Feury, formerly of Le Bernardin in New York City, presides. If you reserve early, there is a chef’s table that seats 12 at which you leave your palate to chef Feury’s imagination for the evening. The wine list is extremely well crafted. Of the desserts, all of which are homemade, I am partial to the warm Vahlrona chocolate cake with gooey center. Lunch here is a three-course bargain at $26.