Marella Cruises, operated by TUI, offers a much more relaxed and "homely" atmosphere compared to traditional luxury lines like Cunard. Their dress code is generally categorized into three tiers: Beachwear, Casual, and Dress to Impress. "Beachwear" is for the pool decks; "Casual" is the standard for the daytime and most evenings, consisting of polo shirts, sundresses, and smart jeans. The "Dress to Impress" nights usually happen once a week and are the "formal" equivalent. On these nights, many guests choose to wear suits or cocktail dresses to celebrate, but a full tuxedo or ballgown is never mandatory. Even on these special nights, if you prefer to remain casual, you can simply dine in the buffet restaurant rather than the main dining room. This flexibility makes Marella a favorite for British travelers who want a holiday vibe without the stiff formality of rigid dinner seatings. Men should note that even on casual nights, most main restaurants discourage flip-flops and sleeveless vests after 6:00 PM.