Yes, the 1820 society or club. Check the navigator for times and location. My brother and I did this 4 years ago and loved it, we meet the first couple times and ended up doing our own activities with people that age group, and are still friends to this day. The do offer different activities each day for this age groups. On our cruise, the meet ups were really just organizers times to see an adult show or gameshow.
I would recommend going to first day or two.