The Adult only group was created to fill a need for a place where adults can play chess, discuss matters of interest and let their hair down without needing to worry too much about causing offence. Think of this group as a pub, bar or coffee house where chess happens to be the main business of the day. Most things are tolerated and if you overstep the line an informal warning is more likely than a ban.
Interested? If you are over 25 then request membership. It would help if you messaged one or both of the super admins with a few words about yourself if your profile is a little sparse.