I can't speak to how accurate the membership roster is that you are looking at, but from what I've seen here at home, there are a lot more beekeepers than I thought there were. Many are just hobbiests who go to a club to take a class, then keep bees quietly at home. That's it for them.
For the rest of us that continue to go to club meetings, it's not only a great way to network (help someone if they are short on resources, or have someone to ask for help when you are short on resources), but our club also brings in speakers to keep us up-to-date on current events.
And, it's kind of nice to have someone to talk bee-talk, 'cause believe me, your non-beekeeping friends get tired of hearing about it reeeeeeaaaaaaal quick.