we have occasional charity related casual fridays. problem is, we also have no dress code. apparently casual days were much more popular before they asked me if i wanted to participate, and had to answer my questions while i tried to figure out why i might. suddenly everyone twigged that if they wanted to wear jeans, they could just wear jeans.
i didn't see the point anyways, since all the clothing i own fits into either "business casual", "corpgoth" or "totally inappropriate for work".