It "could" be really cool. As long as no one who wants to be involved, takes it too seriously. I mean all should be respectful and responsible. But No One should take it too seriously.
I've been in groups before where there were problems because the organization of events and some meetings would get messed up. A lot of good things happened. There were great contributions and so forth & fun in contrast too. But sometimes people the group counted on for certain things would have to let them down, or were not responsible for something etc. That can cause rifts between people when you work on things and other members don't come through, maybe because of a hardship or maybe irresponsibility. But as long as others are willing to step up in case of some need and people don't complain/fight too much about differences, it "can" be a good experience.
Must be kept "respectful" for all people regardless of status and contribution level. But sometimes "formal Clubs" are more work. So, I know from other experience kinda probably the same kind of thing that Gary is referring to. Sometimes it can turn ugly when you try to run and organize a formal group. Sometimes it's too much for some people. Not worth some hassles. Sometimes some people ruin groups for others. If you have people that want to manage it well for everyone and not lose sight of that.. it "could" be good.
Also, would dues $ ever be involved? Most of us spend enough $ on our own tanks and families expenses/school, that it makes it tough to possibly contribute funds to a club. Volunteer services for "working" are mostly free other than transport cost- which anyone should be willing to cover themselves if they want to travel to volunteer at a possible event. But other costs are questionable as to how many people would want to do that. Having dues "could" support more expanded events though and attract eventually some industry guests for local events.
Also,
I know some great clubs that actually have their own club tanks at a club house/ or members site or extra space at a business. All members have the opportunity to learn on the club tanks and contribute small parts of scape/corals as well as system maintenance.
Just things to consider.. I maybe would like to have fun and help the group sometimes. No problem being a lacky to help set up some stuff. But schedules can be tight. I know I won't always be available for everything a club "could" do.
As far as club/organization experience, besides boy scouts, I've also been involved in a wildlife management/fish and game club as a member, a Model Railroading club in Wyoming as a member, and A Science Fiction Club in Upstate NY. So, I know how clubs can be.