I want reasonable price, near the strip and something they can enjoy as a side stop along way to beach.
San Antonio Taco Coa.k.a. SATCO, is a great cheap eats if its all out of your own pocket. Demo's is italian/ameircan style more variety there, similar to a ruby tuesday, or perkins dining atmosphere.
Gabby's Burgers and Fries is not far from downtown! Great, local place with friendly service and fair prices. Try the sweet potato fries! Bakersfield Tacos is even closer to Broadway, and they have delicious food too.
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What direction are you coming from? And what do you mean by the Strip in Nashville? Broadway downtown?
East Nashville has a great pizza place (Five Points Pizza) that is not bad. If you like spicy, we have tons of Hot Chicken places. If you are coming in from the west, the Loveless is popular and not too far off I-40.