Midtown 3rd Ave & 55
Smith & Wollensky's & Wollensky's Grill, corner of 3rd Av. & 49th St.
Pampano, on 49th St., b/t 2nd & 3rd Avs. - Modern Mexican cuisine with an emphasis on fish and seafood
Montparnasse, on 51st, b/t 2nd & 3rd - French bistro
I also really like Pampano, and another option on that block of 49th Street is Chin Chin - upscale, but very good, Chinese. I recently had the crispy fried squid there and it was terrific - perfectly cooked, spicy, with scallions.
216 E 49th St, New York, NY 10017
Smith & Wollensky
797 Third Avenue, New York, NY 10022
230 E 51st St, New York, NY 10022
805 3rd Ave, New York, NY 10022