Group interview for a college course, eh?  Considering that there will undoubtedly be people wearing the scent of failure, PBR, vomit and shattered dreams from the night before, I say you just wear what you would normally wear casually, that is, unless I’m missing the point of what this whole “interview” is about.

Dressing up =/= dressing well, so I really do not know where begin answering your question.  Everyone has his own style, so you’re just going to have to figure it out on your own, through trial and error.  Have fun with it, and whatever you do, don’t conform to collegiate “norms” because that shit is just lame—do you.