Why is this such a hotly-contested issue on our board? It seems to come up about once a week, and elicits such emotion from all parties. I took a quick "tour" of the other boards (Celebrity, HAL, Princess, Norwegian, RCCL) and it seems that if it comes up at all, it is a single posting, followed by four to six polite, consistent answers...and it actually seems to go away! I guess we are not a very homogeneous group, or are more adamant about our feelings. Who knows. I still say, based upon experience aboard Carnival cruises, that it is pretty unlikely that you will be turned away from the dining room on formal night just because you don't have a tie or coat on--and I won't even touch the things I have seen women in! Now, whether this constitutes a breach of etiquette, or a flaunting of convention, or a personal statement, I have no idea--nor do I care. The OP asked a reasonable question, got the "book," the anecdotal and the emotional answers. Each one was correct ini the opinion of the poster involved, and each one added to the knowledge base from which the poor OP must now make his/her decision. I say good luck, but most of all...ENJOY THE CRUISE no matter what you take to wear!