What sort of dress wear is usually required for formal cruise dinners?

• a nice suit
  For most formal cruise ship dinners a nice suit will suffice and you can leave your tuxedo at home. In the event that you need a tuxedo, you can usually rent one onboard. Other items you don't need to take on a cruise include: towels, as there will be plenty of them; an iron. since there will be one in your room; too many clothes, as you won't have much space in your cabin; alcohol, according to the ship's policy; and cash, as theft is common on cruise ships.
• a tuxedo
  For most formal cruise ship dinners a nice suit will suffice and you can leave your tuxedo at home. In the event that you need a tuxedo, you can usually rent one onboard. Other items you don't need to take on a cruise include: towels, as there will be plenty of them; an iron. since there will be one in your room; too many clothes, as you won't have much space in your cabin; alcohol, according to the ship's policy; and cash, as theft is common on cruise ships.
• a top hat
  For most formal cruise ship dinners a nice suit will suffice and you can leave your tuxedo at home. In the event that you need a tuxedo, you can usually rent one onboard. Other items you don't need to take on a cruise include: towels, as there will be plenty of them; an iron. since there will be one in your room; too many clothes, as you won't have much space in your cabin; alcohol, according to the ship's policy; and cash, as theft is common on cruise ships.