We are just back from a 14 day cruise to Hawaii on Summit and the daily newspaper printed the "required" dress of the day. Now I didn't see anyone in the dining room or theater dressed casually on formal nights but I did see people in shorts & jeans in the casino. But by 11:00 PM, who cares? I have to admit that I did see a greater proportion of men in tuxes (including our own group) than I would see on a 7 night cruise. Maybe because there were 3 formal nights and they felt they could get a little more wear out of the tux.