I just refused. Lookswise they weren't ugly (on the skinnier side, vaguely asiatic, short to medium height) but I flew to Cali to be autistic not to have sex.
They also asked a Rie cosplayer who was a total knockout but I'm fairly sure she isn't a slut
One of the saddest bits of info I ever learned is that showing up to have sex with strangers is why there is so many conventions. Though I've been told that Historical Re-enactment is about the only place that doesn't happen. Ren Faires are apparently 1600s Woodstock.