During the day we go as casual as we like, shorts, tank tops, swimsuits. For dinner, we always dress nice, formal nights even nicer! I know it happens on every cruise where you'll see some people wear jeans or shorts in the dining room, but I feel on the cruises we've been on that most will dress nicer for dinner than not. But...it is YOUR vacation. We went on one where we never even went to dinner except on lido and we sure did save on the luggage LOL...talk about going casual!