These are some random places that serve cheap food. The casinos on the strip generally have extremely high prices, for mostly average food. About the most you can say for the cheap dining list below is "not all that great but it's food". There are many others of course but these are the ones that come to mind right now. Please add your own.

The Sahara buffet

Food court Harrahs Chipotle (beware of homeless)

Carnival Court at Harrahs might be cheap during happy hour, I can't remember

Food court Flamingo

Subway and Dennys Casino Royale

Cafe in The Wild Wild West

Several small places in New York New York

The Food Court in Fashion Square Mall

Ellis Island cheap beer and ribs (slightly off strip)

Tommy Rockers cocktail hour (slightly off strip)

Palms breakfast buffet (slightly off strip)