At Florida Tech, the two sororities (will be 3 in 2 years when Phi Sigma Sigma participates in Formal Recruitment) set up camp at opposite sides of the plaza outside the Student Union from about 12-4 on Bid Day. The new girls go inside and receive an envelope and open up their bid. I don't think we even tell the RCs if we're going to accept, but maybe we do (I was so excited I was jumping around and screaming that I think it was pretty obvious that I was accepting). Then the girls go outside to the tables and tell the sorority if they're accepting.
The girls are usually so bad! They'll walk towards one and then zig zag over to the other one and then finally arrive at their table. It kills us!
The only problem I really see with this is that there was one time a girl didn't get a bid (if you get to Pref, you're going to get a bid on this campus) and no one called her. Instead she just showed up and the RCs were like umm... there's no bid for you.