We rented a tux for DH on the 7 night Eastern. We were with the "Pink Ribbon Cruise Group", and were travelling with 30 other folks. DH wore his tux the first formal night, and was dubbed "Mr Bond", by the 27 other ladies in our party. He did look great, and to this day when we run into folks from the cruise online they refer to us as "Mr. & Mrs. Bond".
We have rented several times on longer cruises so that we don't have to carry a suit with us.