FPDK,
Whatever you do, while in Nairobbery, do NOT miss out on restaurant Carnivore (
https://www.tamarind.co.ke/carnivore/ ) . When I started out my flying "career" down in the dark continent, Wednesdays nights used to be referred to as "white trash nights".. The food is awesome, and if the ever smiling "medicine man" is still around, you'd be foolish not to try the drink he serves.... There a worthy alternatives to the Masai Mara, look into Tsavo East.. If everything else fails, there is always Nairobi national park.. Also you could consider a 2 nights in Mombassa at White Sands ( if still around ).. One last word of advice - whatever you do in Nairobi, be very, very careful, as in watch your back, though most people are friendly, it's a hostile place.
Karibu sana Kenya