Kengeles Bar and Restaurant Nairobi is great for gathering with potential clients if your looking to kick back and have a conversation.
They serve a variety of drinks including Kenyan beers. The food is decent and the atmosphere casual.
It was a little hard for our driver to find, but once there we enjoyed ourselves without worrying too much about security.
If your paying by credit card, be sure you go with the server and retreive it as soon as the transaction has processed.