Agreed regarding non-formal, or casual, restricted segregated dining, However, can dine formal in any dining venue on Cunard.
Going forward, one will be formal, or minimum semi formal (suit), on every evening, except the first, as if on a crossing. My DW just loves formal, as it gives an opportunity to dress above cocktail. Yes, also for one’s DW there will be many additional garments, for the usual change of mind.