I'll give my standard recommendations:
Peanut Butter and Company - the seating area is small, but the food is really tasty.
burger joint in Le Parker Meridian hotel (go through the front, and hang a left right past the check-in desk) - excellent burgers in a place that looks like a throwback to the 70s. The menu is basic: burgers, fries, shakes and sodas.
Also the Tea Box at Takashimaya, which is near the World of Disney store on 5th Ave.
craftbar and 'wichcraft are both owned by Tom Colicchio of Top Chef fame. I've had tasty meals at both places.
Craft family website
Have a great trip!