I went through informal rush. On my bid day, my roommate and I waited in our room for our bids to be slipped under my door. All of a sudden, we each received a bid inviting us to pledge D Phi E. I was having dinner with my literature class at my professor's house so I had to leave before we heard from Alpha Phi. When I got back, my roomie told me that we were both invited to be founding sisters of that chapter of Alpha Phi. My roommate went Alpha Phi and I went DPhiE!
All that I remember about formal rush is that all the women who handed in bid cards went to the University Union to see if they were extended bids. I was a weird sight because so many of these women were elated and thrilled and a handful were devastated as they learned that they recieved no bid.