Thanks to all for your insight and suggestions.
It turns out I was able to get a nice rate at the Hilton through the JSE. They also had a rate at the Protea, but they were sold out for some of the days of my stay.
One more thing, although it's been a while since I stayed at the Hilton, the massages in the spa were excellent.
Thanks stimpy. I always appreciate a good massage after a day on the floor of an Exchange