Review for Rio Hotel & Casino Review For Carnival World Buffet Google User Aug 6 '18 at 6:48 Best bang for your buck. They serve all you can eat crab legs from 4-5:30 I think. They keep a decent stock of them too. Only thing I didn’t like was the prime rib and steak very chewy and hard. Wish the souvenir cup had Rio name or logo on it. Didn’t eat to much of the other food just the crab. They no longer have lobster tails. View full site to comment or like