The clubs each had to have their own rules, of course, which were likely as random at the reasons for starting them in the first place. I remember once creating a set of rules and regulations recorded on numerous sheets of notebook paper. Each was taped to the next, so that eventually we had an official scroll - sort of like our club Torah (the Jewish religious text). When we were finished reading or writing in it, we'd roll it up until next time.
Perhaps my most exciting contribution, however, was the creation of my very own secret language. I called it "Lastarm" (for reasons now lost in time). It was, more accurately, a secret code, but I couldn't have made the distinction then. Each letter of the alphabet was replaced with an entirely new symbol, with its own pronunciation. After I created Lastarm, we not only recorded our club documents in my new "language," but we practiced speaking it as well. We had serious meetings to discuss the serious matters at hand.
The members were usually the same - the kids on my block - Larry, Chris, Eric, Charlie (actually, he lived down the street and up a hill (impossibly far away, but we made an exception) and myself. Sometimes one kid or another was excluded, and the stability of the club was always shaky at best, as our shifting kid allegiances invariably caused conflict and confrontation. A few weeks would pass, and we'd try again with a whole new set of rules, title, missions and dares to complete.
It was, I guess you could say, a shadow government of third and fourth graders, operating right under the noses of the ruling elite (our parents).