I would absolutely reccommend eating in the Opryland Hotel & walking around - it is really something to see at the holidays!! Their restaurants are mainly more upscale, but they also have a burger & a pizza place too. Here is the deets on the dining inside the hotel:
http://www.gaylordhotels.com/gaylor...ctivities/nashville-tn-restaurants/index.html
In the neighborhood just outside the hotel there is an Applebee's, Cracker Barrel, Bob Evans, Santa Fe Cattle Co, Caney Fork Fish Camp, **** of the Walk (fried catfish), McDonald's, a super Thai place (Sukho Thai), and a couple of other little hole in the wall places. I would say that the Caney Fork & **** of the Walk are a bit touristy, which you may prefer, as you are touring the area!!
Also - there was an announcement that the Margaritaville downtown is opening on Monday 11/22, so if that appeals to you....
Downtown (Broadway & Second Ave area) also has a Hard Rock Cafe, Wildhorse Saloon, a couple of brewery pub/grills, Old Spaghetti Factory, and as the pp mentioned - Demo's is VERY good!!
Everything that was located in the Opry Mills Mall is closed, as the whole mall is still under flood repair (or not actually, as they ran out of insurance money & are no longer working on it). The only thing that reopened at the mall is Bass Pro Shops - which you may want to stop at because they have free photos with Santa & kids' crafts-check out their website!
Enjoy your trip to Music City!!