I'd say yes ... ok for Set III but not for I and II ..
the chapters will be wearing t-shirts and shorts for set I
the Greek Life guide (that's on line) ...
http://www.union.arizona.edu/csil/gr...ifeGuide06.pdf
has pictures of what to wear and in this case is fairly acurate of what to wear ...
be sure to wear comfortable shoes as you will be walking from house to house and you won't want to have hurting feet