I don't think you need a specific "title" or anything. I suggest calling your local county officials and see what the rules are about medicinal marijuana. I know anybody who will work in the club must have a doctor's recommendation (obviously).

Pot-Laws.com : How to Open a Medical Marijuana Dispensary :: Know Your Medical Marijuana Rights

There are also rules & regulations (depending on the county) as far as the limit you can have at a time. Also, finding friendly neighbors around the place you want to set up shop will probably be a hard job as well.