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Our rush registration fee was $0 ... In fact, back in the day, all freshmen and transfer women were considered "registered for rush" by default - only non-transfer upperclasswomen had to explicitly sign up. If you were a freshman/transfer and didn't want to rush, you just didn't show up. Every year our Panhel had to justify why 450-500 women were registered for rush but only 150 or so were invited to round 2...
</hijack>
I actually like the idea of adding some structure to IFC rush. I don't think a highly structured NPC-style rush would fly with men (I think their heads would explode if they had to do bid matching

), but I do like the idea that the men are being encouraged to meet representatives of all the fraternities. With a totally unstructured rush, men often go to only a few fraternities and may completely overlook a fraternity that would have been a perfect fit.