The different organizations the human race has brought to life is uncountable.
Most people belong to something, even if it is just a health club.
Perhaps you are looking for something different. Many good organizations go undiscovered simply because it is hard to advertise. We know of a muzzle loading club that has been in existence for thirty years, yet many times they will get a new member that has been shooting and looking for a muzzle loading club for years. We hope this site will help. You are welcome to post a link here, free of charge.