the first couple cruises my husband brought his tux along. the next one he rented and it was so large it fell off of him. they tried to tailor it because they said they had nothing else. he wore it but he couldn't stand it. now most of the time we go to buffet on formal night unless it's the holidays. on royal caribbean they had 3 formal nights on the holiday cruise. our waiter was so nice he said if you just dress nice i won't say anything. so my husband threw a sport coat on otherwise we were going to buffet because he wore tux the first 2 formals which were christmas and new years eve.