OK that helps. If you want to go a little dressier and it is no frills- I'm assuming that no clothing items can be ordered in bulk- right? I would do a sun dress. These are universally flattering on every one. I would choose a color that is either a Chapter color or a color that looks best on most people. You can have them wear strappy sandals and your pin. That way you look uniform and most girls will have a dress on that makes them feel and look good and they can choose shoes that wont hurt their feet. Our group has done this in white and some other colors and it always looks good- plus most girls are tan during recruitment