Jim when I lived in Sacramento I worked all the time and no time for much else. But I do love that area. The weather is the best I have ever seen. I was in that area for about 8 years. I drove past a glider air park a few times. Its been so long ago I could not tell you the location.
When it comes to clubs and aviation all together. Its a dieing sport or hobby. We can all argue this but it is what it is. Aviation just does not have the young ones lining up to become pilots. We do see some but not like years past.
If they where to redo this list in a few years half these clubs will be gone. I know of at least a few in my area that will be gone in 3-5 years if they hold on that long.

Tony