I myself would be searching the thrift stores for the absolutely most over the top awful white skirt/dress I could find. Or wearing white shorts under my robe. Can't believe this lameness still plagues us - it was lame 20 years ago when my friend kate was dead set against it... Her very good friend punkwalrus wrote about it
http://punkwalrus.livejournal.com/595375.html#cutid1

It is down a little ways, but it'll let you see the lameness that was my highschool.