On the two cruises that were not with extended family or friends, so that we were grouped by
DCL with "Strangers", we're 1 for 2 in terms of success. First time DW, DS and I were paired with another family of three, though their daughter was 2 and DS was 6, there were terrific, we had fun, swapped ideas for the next day's shore activities, and often as not ended up running into them and hanging out some.
Last month we were seated with an assemblage of 5 family members, including cousins, great aunts, single mom and two kids, with all of their children in the party being teenagers. The teenagers were at a phase where it wasn't "cool" to pay attention if DS, now 8, tried to engage them in conversation, and these folks weren't communicative, anyway. Terribly stiffening every evening, and it did detract from the cruise experience. It happens, I guess. Just a completely different background and never found any conversation topic in common in order to find something in common to talk about.
I have requested DCL give us a table for 4 for the three of us for dinner, and while they won't guarantee, they took the request and we'll see. Would prefer a good match like the first example to just being by ourselves, but the downside to a bad match having been shown to me, I'd forfeit the comradery to avoid the deadening aspect of such poor luck again.
I like the idea of finding table buddies here at a cruise meet thread, and might change my tactics to that one.