3930 South Las Vegas Boulevard #121A, Las Vegas, NV 89119
In the shops between Mandalay Bay and Luxor. Gluten free burger buns ($1.75 up charge) and very knowledgable staff on GF sauces and sides. No dedicated fryer - management very concerned about contamination; came to our table when someone ordered fries to make sure it wasn't the person with the sensitivity. 4 GF beers on the menu as well.
3771 South Las Vegas Boulevard, Las Vegas, NV 89109
The Denny's on the main strip (across from NY NY and Monte Carlo) has a gluten free menu and educated staff. Does not have a dedicated fryer, so nachos and fries aren't GF. It's outside of the resorts at regular Denny's prices.
1104 Locust St, St Louis, MO 63101
Wonderful menu and great service. Gluten free crepe shells are available at no extra charge - just be sure to confirm that your meal is gluten free before you start eating as the food isn't marked. The gluten free crepe shell looks a bit different from the standard one if you look at them side by side.