I'd be inclined to check with the hotels about their T-day dinner offerings. Especially with everyone in town for the parade.
Did a google search and this came up at this link (if you go to link, I think you can click on the restaurants)
http://gonyc.about.com/od/thanksgiv...y_Restaurants_Serving_Thanksgiving_Dinner.htm
..Gallagher's Steak House
The four course Thanksgiving Dinner is $50 at Gallagher's Steak House. The menu: Corn Chowder Soup; Mixed Greens Salad; turkey with stuffing, brussel sprouts, Mashed Potatoes, Sweet Potatoes, Orange Spiced Cranberry Sauce, and Giblet Gravy; Pumpkin Pie with Whipped Cream, Apple Pie, Pecan Pie or Cheesecake; and coffee or tea. You can also order from their a la carte menu.
Zoe Restaurant Thanksgiving
This SoHo restaurant will be offering a three-course Thanksgiving menu. $59 per person. $25 children's menu also available.
The River Cafe Thanksgiving Dinner
Located in Brooklyn, the River Cafe is well known for its location and breath-taking view. Their three course Thanksgiving menu is $125.
Metrazur
Metrazur's three course Thanksgiving meal is $59 ($29 for kids 10 and under). The menu offers many options from the traditional turkey to striped bass. Address: Grand Central Terminal East Balcony; Phone: (212) 687-4600.
Keen's Steakhouse Thanksgiving
A four-course Thanksgiving dinner is being served at Keen's Steakhouse for $86 per person, $43 for children under 12. Menu includes Lobster and Prime Rib, as well as more traditional Thanksgiving choices.
Virgil's BBQ
Located in Times Square, Virgil's offers a tasty Thanksgiving menu featuring BBQ'd turkey for reasonable prices.
Village Thanksgiving Dinner
Three-course Thanksgiving dinner menu, featuring sides served family style. $72.50 for adults, $36.25 for children.
The Red Cat
Thanksgiving Dinner prix-fixe for $65 with seatings from 3-9 p.m. Children under 12 pay $45. The Red Cat has a reputation for serving a lovely dinner and tends to book up early.
Tavern On The Green Thanksgiving Dinner
Four course traditional Thanksgiving Menu for $92 per person, ($125 in Crystal Room). Children under 12 for half price. Call early for reservations. Address: Central Park at West 67th Street; Phone: 212-873-3200.
Sea Grill Thanksgiving Dinner
Three course Thanksgiving dinner menu features extensive fish options, as well as traditional Thanksgiving dinner choices for $78 per person.
Cucina & Co. Thanksgiving Dinner
The a la carte offerings at Cucina & Co reflect the Thanksgiving Holiday and most main courses are under $20. Children's menu also available.
Brasserie 8 1/2 Thanksgiving Dinner Menu
Three course menu with 5 choices for each course. Includes traditional Thanksgiving dinner choices, as well as more contemporary options. $75 per person.
Brasserie Thanksgiving Dinner Menu
Three course Thanksgiving Dinner menu, including choice of appetizer, entree (turkey, prime rib, pork or cod) and dessert. $59 per person. Children under 12 half price.
L'Absinthe Restaurant Thanksgiving Dinner
L'Absinthe, a French bistro on the Upper East Side, will be serving an a la carte Thanksgiving menu.
Ellen's Stardust Diner
Ellen's Stardust Diner will be serving a three-course Thanksgiving Day Dinner for $39.95. Regular menu will also be available. Reservations are suggested. 1650 Broadway Corner of 51st Street. Phone: (212) 956-5151
Rock Center Cafe Thanksgiving Dinner
Includes First Course, Main Course And Dessert. Both traditional Thanksgiving Dinner and contemporary options available. $58 per person. Separate menu for children 10 and under.
Aureole
This elegant Upper East Side restaurant will be offering a $115 three course Thanksgiving Menu. Address: 34 East 61st Street; Phone: (212)319-1660.
Bistro Les Amis
This SoHo French bistro will be serving a $39.95 dinner on Thanksgiving. There is also an a la carte menu available on Thanksgiving. Address: 180 Spring Street; Phone: (212) 226-8645.
Cornelia Street Cafe Thanksgiving Dinner
This West Village restaurant offers a good selection for their reasonably priced ($55) Thanksgiving dinner from 2-8 p.m. They also have a children's menu available. Check out the full menu on their web site.
Good Thanksgiving Menu
This West Village restaurant offers a $68 four-course prix-fixe menu for Thanksgiving. A two-course children's menu is available for $29. Good is an intimate restaurant that serves high quality food. Four seatings for Thanksgiving dinner from 1-7:45 p.m. on Thanksgiving Day.
Other Restaurants Open on Thanksgiving
From OpenTable.com reservation service, this page offers a list of restaurants that will be open on Thanksgiving and brief descriptions of what they will be serving.
