Yes, virtually all Princess Cruises voyages that are five nights or longer feature at least one "Formal Night," which the cruise line officially calls "Dress to Impress" nights. On a standard 7-night cruise, there are typically two such evenings. During these events, guests are encouraged to wear tuxedos, dinner jackets, or dark suits, while women often opt for evening gowns or cocktail dresses. The "Dress to Impress" nights are a core part of the Princess brand identity, designed to evoke the "Golden Age" of ocean travel. However, Princess has become more relaxed in recent years; if you do not wish to participate in the formal dress code, you are not excluded from the ship's activities, but you may be asked to dine in the World Fresh Marketplace (buffet) rather than the Main Dining Rooms. Additionally, the "MedallionClass" technology on Princess allows you to order high-end food to your room or other casual areas if you prefer to stay in your loungewear. While the tradition remains strong, it is no longer a strict "suit-or-starve" policy, allowing for more passenger flexibility.