LOL PantHer!!!!  I remember that well...Vicky Vaughn was another one around that time.  I should just go look at the labels on Mom's clothing that I saved.
We had a structured informal rush that lasted 2 weeks, and 7 sororities.  Meet the Greeks I have no clue what I wore.  Same for much of the theme week, but I do remember I wore pleated capri jeans (lol) and an orange polo neck sweater to ASA's theme party.
First night of prefs I wore my HS graduation dress...blue and lavender plaid with this sort of corsety belt thing in the middle.  Not really in season but it was one of the better things I had.  Obvi I didn't "preplan" my rush outfits before I went back to college. 
Second night of prefs I wore a pale pink tank-top dress (see the Steve Perry Oh Sherry video) with a (borrowed) dusty pink Shaker knit sweater over it.  The first party of the night there were 50 sisters plus probably at least 60 rushees crammed into a dorm suite.  With candles.  I thought I was going to die of heat stroke.  And THEN I had to go to another party.  Bleeeaaahhh
Third night of prefs (this was ASA) I wore a black sweater with pink cabbage roses on it and my friend Tina's black knit skirt.  (This was my fave outfit which is why I saved it for ASA.  I kind of knew. 

 )
As you can see I would have been royally screwed if I hadn't had a dorm floor of girls to borrow from - I don't think any of us made it the whole way through rush in completely our own clothes.  This is just another reason I <3 deferred rush. 
 
Pledge pickup night I wore jeans and the ubiquitous sleeveless/cap sleeve Shaker knit top.
On another note, I also remember what I wore the first day I got to campus.  The aforementioned capri jeans, a rainbow striped cutout-back shirt I got in Florida, jelly shoes and every rubber Madonna bracelet I owned.  
