My daughter's wedding is at the end of May. She is wearing a lovely ivory strapless full skirted (ball gown style) dress. The wedding party will be in tea length strapless dresses or tuxes (obviously depending on gender) and the reception is semi-formal, cocktail, not black tie. So question is, what is appropriate for MOB - long or short or is either okay? Choosing between a long navy lace with sequins or a short metallic floral?