Joining a CD support group is no different than joining a Model Railroading group. One can be a model railroader, even build a big layout in a spare bedroom, garage, or basement. This person can have a very enjoyable time operating his own layout by himself. Then he joins a railroading group. Sees other members layouts, get tips on this and that, they see his layout. He finds he enjoys operating some elses layout and enjoys seeing others operate his. He enjoys being around others that have a like interest.
I joined a railroading group when I lived in WV. It was a invitation only group. That is it was not open to the public. Why, model railroad layouts can cost thousands of dollars and trusting ones layout to others takes trust and getting to know the other people. It took me a year before I was offered a membership, as I built up a re pore, friendship, and their trust. My interest, skills, understanding, and modeling improved because of my membership.
Same for a CD group like Tri-Ess. Yes we have some rules, like we request (not demand) that your wife know, We like to meet a new member in drab outside of the club the first time, and etc. In fact you don't even have to be dressed to attend. Dressing at meetings is a individual choice. Most of these rules are because we want all our members to be safe and enjoy themselves at the meetings. We want to make sure that the new member is really a CD and not someone looking for a cheap thrill and etc. We do encourage wifes and SO's to join and attend, so that they can see others like their spouse and talk to other wifes/SO's. A support group can be the only place a closet CD can go to dressed and feel OK, because he is among others like himself and can feel safe.
We don't advertise the address of our meetings or even the general area. we do this so that our members can have a safe place to meet and enjoy each other's company.
I have learned a lot about dressing, makeup, and ect. I have made many good friends and some have even offered to go out with me which has helped improve my confidence. even my wife has recognized the benefits of my Tri-Ess membership and she has yet to go to a meeting with me.