I agree with Kuki. The response I posted earlier was a cut + paste of Carnival's reply to my inquiry. It was not a form letter. The ship's cabins are specifically designed to accomadate 2, 3, 4 or more guests. Some have single uppers, double uppers etc. I can appreciate Carnival's decision to ban rollaways. I imagine it creates a houskeeping nightmare. And worse yet, a potential blocking of fire exit routes. If you are traveling with 3 or more, simply book a cabin designed to accomadate that number of guests. And as Carnival stated, availability rules.