Starting in April, Harrah's properties is offering all day buffet for $29.99, during a 24hour period as many times as you like.
Caesars- Lago Buffet
Paris- Le Village Buffet
Rio- Carnival World Buffet (not to be confused with the seafood one, I wish lol)
Flamingo- Paradise Garden Buffet
Imperial Palace- Emperor's Buffet
and their newest property, Planet Hollywood's- Spice Market