with your local club. Zsport is a great group of people with lots of great resources. They are also a charter member of the ZCCA. Zsport does have Z32 members but they are not as involved. Attend the meetings and suggest ideas on how to get more Z32 and 350Z owners involved. Tell them what you'd like to see done or better yet, volunteer to help do stuff.
Here in Austin, we were in the same situation as Zsport with most of the original members being older Z owners. We have gotten the Z32 owners more involved now as well as 350Z owners. The club continues to get bigger and better as more Z owners get involved and we are able to enjoy all Z generations at our different events.