In our 20+ cruises, we've only been mis-miatched once--our last one. We were seated at a table for 12 (!) with the following mix: a pair of grown (25-ish) children and their parents, two older (80s) couples, a couple who just retired (70s) and were very angry that they weren't sitting with the group from their retirement community, and us (51 and 37). Needless to say, conversation was 1) difficult due to the size of the table, 2) strained since we had nothing in common, and 3) consisted mainly of complaints from the folks who wanted to be with their retirement community. We asked the Matire'd for another table, and when we saw the waiter later in the cruise, he said that everyone had asked to be moved! I guess the feeling of being "mis-matched" was universal! LOL!