Black tie optional definition
Black tie optional means the couple would prefer black tie attire but do not want to impose the financial burden of pur- chasing or renting appro- priate clothing on attend- ees. If you own black tie (tuxedo with a black bow tie and cummerbund for men and a dressy floor- length or cocktail dress for women), wear it. If not, dress as nicely as you can. A dark suit and con- servative tie or an elegant ensemble of separates is appropriate.