Zamunda, where are you from?
Typical stereotypes of Capetonians is that
1) All the white men are gay.
2) All of us are lazy, and we count friday as being the start of the holiday (there's an old joke that Cape Town isn't called the "Mother City" because its SA's first, its because everything here takes nine months to get done)
3) We smoke too much weed
All three are true.
Seriously though, Cape Town does have its own Gay Village and is quite accepting of the homosexual community. In general, it is a very metropolitan city, with a diverse range of peoples. Youtr friends are gong to UCT, you say? Shame. The Glass Tower is so isolationist and also physically removed of "the real Cape Town experience", that you're only bound to run into a small segment of Cape Town. And it the one containing many gays. so if you're homophobic, good luck.
But hey, its a great city. Damn Beautiful. Do yourself a favour and come in Summer (Dec. - March) No real point of coming in winter.