The use everything and I do mean just about everything. <G> Giftwarapping paper, ribbons, cardboard signs, balloons, tinsel, etc, etc. This is usually done only with fairly large groups and they often have contest for the best theme or door. I know the crew does not want you to use duct tape or any other tape that leaves residue when it is removed as it is such a pain to clean off. Also please remove and clean it off at the end of your cruise.