garden4cook - just so that you know. The dress code technically applies to the entire ship for the evening, not just the Anytime Dining rooms, the Traditional dining rooms and the Specialty(extra charge) restaurants. The only place that you can dress casual on Formal nights and eat would be Horizon Court buffet and room service. We found that on Princess if you are planning on attending any of the special events on formal nights, that the vast majority of the passengers stayed dressed in their formal wear.