Formal night

Each of the dinners on the cruise had a dress code - formal or smart casual.
There were two formal nights where everyone got to dress up (suit for men, dress for women).
Talking to customers who have been cruising for a while, the standards seem to have been relaxed quite a bit - men could get into the dining room without a jacket for example.
This photo is from the Captain's welcome function, where there was free Champagne and hor d'oeuvres.
The Captain came out and welcomed everyone to the ship and mingled a little, you could also get your photo taken with the Captain if you wanted.
All photos were put in the central area of the ship where you could purchase them at a later date.