If you are within walking distance or have a car AND you are SOBER, this little restaurant (NOT THE BUFFET) in Terrible's Casino is the best food deal in Vegas. The food is higher quality than your mid-level buffets with huge portions and at a great price.
It's a great late night meal option. For you breakfast food lovers at all hours of the day, you'll be in heaven.
One warning - Don't get the Madagascar Chicken. It's a huge plate of pasta with less than 1/3 of a chicken breast in it. If you are a non-meat eater, tell them to hold the couple measly bits of chicken in it and you'll enjoy it.