What ever you call your gathering,folk club,session,or open mike night,or any other title you have an idea of what policy and content you want to present.
You advertise said gathering and hopefully give an indication of what your policy is.
If people are interested they will come and try out your gathering.
Continued success will depend on you attracting sufficient numbers to make it viable.
This applies to any form of policy,be it a club of the sort that Jim believes it should be,or Musket,Al or Gss or anyone else would prefer to see.
Clubs,sessions or any other gathering only work if enough people in your neighbourhood have a common interest.
If you are the only person who has that particular vision it will fail.
That's life.