I have friends in FL that I have been trying for months to convince to join me on my cruise. They are very spur-of-the-moment people and I just can't get them to commit. Then yesterday they said "ohh who knows maybe we'll just suprise you and buy a ticket at the port" Can they do that? I thought I read somewhere that they 'close' the ship for sales before it sails. (he he that sounds funny) So can they buy a ticket at the port?