If you read the link by ebayj, the story notes a few straight (unbent?) pax.

I imagine NZ would have mentioned to anyone booking that it was a special party flight - in addition to being a non-regular schedule.
There would be no doubting it with the drag queens and whatever else was adorning the gate area at the time - plus media attention and I bet there was additional booking info to warn guests it might be an unusual ride.

Was Daffid offended that there were gays in SFO?