What cruise would you recommend for a group of about twenty people (a few singles but mostly dating or married couples with no kids) who are in their mid-twenties? We are getting together for a five year college reunion next summer and are looking into a doing a 7-day cruise. This same group (for the most part) went on a cruise with Carnival (the "Imagination" I think) our senior year in college. We are looking for something a step up from that experience (which was full of Spring Breakers - including us). Any recommendations?