Nairobi tops it, great Kenyan/Ethiopian/chinese girls and for a bit more pricey Czech girls , loads of massage parlours with some of the best massage hr , I have experienced.
There are also some hidden Chinese parlours but these are hard to find - the one i visited a few years back in Hurlingham i hear shut down , was getting FS for as low as £20 - £50.
Areas such as parklands / Ngong road /kilimani - lots of options and activity
In Mombasa - most hotel massage services girls always willing to go extra