So pack a little of everything when you’re getting ready to set sail. Some dining and nightlife spots always have light dress regulations (“Cruise Casual”), while on certain nights these spots ask that you go all-out (“Cruise Elegant”). While you can always wear what you want - most onboard spots are ‘come as you are’ - there will be certain opportunities for dressing up during your cruise. When you’re on a Carnival cruise, should you dress up or dress down? The answer is: YES.