If a place/ club or society declared itself "for whites" it would be (and rightly so) hounded, there would be a public outcry and probably would be shut down.
Yet it seems this is not a problem for clubs and societies for black people. These groups can, in fact, openly recruit and advertise.
Couple of examples:
http://www.bmfonline.co.za/?page=who_we_are (starts with we are a non-racial... )
There are of course many others. Now in the above, if you changes the black for white - people would have a serious problem. Weirdly, I would not have a problem if groups where there for different cultures (so Zulu, German, Xhosa, Greek), but bugs me it's raced based and it's deemed ok.
I personally would not want to have anything to do with any organisation that defined itself on race - infact, I thought this would be against the constitution. It seems not.
But, as said, am I just not looking at this correctly? I would be interested if members of these clubs would have a problem with a whites only club? I think not.