I know of the IBM(www.magician.org) which is a Worldwide Organization and SAM (www.magicsam.com) is based in the U.S. organizations which have local clubs. in my area, there is an IBM Ring. These clubs meet monthly to discuss magic. I believe the SAM clubs do the same.
There is also a "Mail Order" club called the International Magicians Society (www.learrnmagic.com). The sell instructional videos which range from beginner to intermediate and cover various magical topics. They do not have any local clubs.
Last September, I joined myLocal IBM Ring. I was, of course required to perform a trick on my first visit. I performed my new Cups & Balls. I am not a great performer yet, but the simple act of showing my magic to other magicians yielded a couple of very concrete tips which will improve my magic in general. I recommend joining a local club.
I hope this helps