What to Wear to a Black Tie Optional Event Ivy City Co Dear Diana: What Exactly is Black Tie Optional? At weddings, does black tie always mean a floor length gown or a tuxedo? Style and etiquette experts weigh in on the traditional black tie attire required for men, women, and kidsand the more Black tie dress code for women, explained by a stylist Aspen Midi Dress Black Satin Slip Dress Lady Black Tie