The Riverside has a few good choices. The Gourmet room is pretty good. The prime rib room is a step above a buffet. Casa Serrano has great salsa & chips and the food is bueno.
The Golden Nugget has the Salt Grass, it is a chain, but it's decent. The shrimp stuffed jalapenos kept me coming back.
Harrah's has the Range, which is also pretty good.