We love Boma & Jiko
Boma is the best buffet around! Most of the food will be familiar to you, but with some African/Greek/Middle Eastern seasoning. Some of the food you've probably never seen before but is worth a try. Lot's of things to eat, even for picky eaters.
Jiko is a Signature dining restaurant. The food & service are to die for

Our server told us that most of their menu items are American foods with an African inspired twist.
At either one, make sure you try the hummus! It's wonderful
As previously mentioned, there is a bar off the stairs between the lobby & Boma, overlooking Boma. Neat place! There's also a bar inside Jiko.