Worst buffet I ever had was the Riviera lunch buffets of the late 1990s..just completely horrible on every level, except price. Each meal you had a 50/50 chance of getting exploding diarrhea.

As far as the current buffets go, my vote for worst is the garbage they serve up at the MGM Grand breakfast buffet.

It is amazing to me how MGM gets away with such horrible food, at expensive prices for both their breakfast buffet and breakfast in their coffee shop restaurant..