Depends on what you drive, and what you want out of a club.
I started a sort-of Mini club for the area, but most of the folks are unreliable to attend anything. We have no dues, no officers, no newsletter. Just a mailing list advising when shows come up we can all get together at. That's as much organization as I want to put into it. If nothing else, it keeps us all connected.
I've toyed with joining BMWCCA a few times but really don't think I'd get my money's worth out of it other than the Roundel, which is brilliant, but I have enough stuff to read. The local chapter is truly a wine and cheese group which doesn't interest me.
I can only tolerate so many car shows before I've had enough. Get me on a tour or something and I'm there. Too many sports car clubs don't do anything involving motion. When they do, I'm always there to participate.
For racing, NASA is a necessity and I get my money's worth out of it. SCCA is just expensive, but if I want to hill climb next year I'll have to pay the price.
Dues do factor into my annual car budget. If I'm not getting a good amount of fun out of it I'm not going to bother.
The internet is fast becoming very effective at providing the basics of clubs: friendship, tech support, parts locating and so on. Events have even blossomed from online contact. I think the traditional club with dues, officers and newsletters is something whose time may have truly passed.