Okay, I'm not *positive* this applies to sorority rush, but for a service org I'm in that has a rush, and we have lots of sorority girls in it, we're warned of playing the "name game"
For example, don't say "If you're from Townsville, do you know Jane?" because the rusher may dislike her, etc. The story that we pass around is that one girl came through and said "oh, you're from my town! do you know John?" the rusher said "yeah, I do!" the rushee said "he's my boyfriend" and the rusher said "um, no he's MY boyfriend"
We're always told to steer away from those convos whenever possible - in our rush workshops they always tell us to avoid the name game!