A favorite hangout for expats in Nairobi is the Java House Restaurant. It's a chain, but we have only been at one. They offer great coffee drinks and sort-of Mexican food. It's a pleasant place to hang out and enjoy food and friends.
Rachel loves the play area. (In the pic, she is running around the play sculpture. Alas, the light was fading as I took the shot.)
I must say that the cup of decaf Heather and I enjoyed last night was the best I have ever had.