These short cruises are party cruises and myself and my sister went a couple of years ago on Brillance of the seas for 3 nights and it was a party cruise. We wanted relaxation so we stayed away from the bars as the ship was big enough. If you want to cancel you will loose your deposit but you have to do it quick. I would recommend moving your cruise to another ship and sailing dAte and go for a longer cruise as you will definately like royal cxribbean and it is much much better and you will enjoy it.
That was totally a one off - suspect you are talking about their 2n over to Le Harve - not a true representation of what cruising with RCI is like at all - and full of people who have never cruised before and who did not know how to behave I suspect. It was also sold off at a rediculously cheap price which of course attracted undesirable types. I would also not recommend a 4n cruise as I suspect you get more of the same. I suggest you move to one of their longer cruises, avoiding the school holiday season [mid June to end Aug] - if you do so I suspect you will be pleased you did and very impressed with the quality of service RCI offers! You can move your sail date with in your some booking reference and therefore you will not lose your deposit.