Pond clubs are a little difficult, I think, because people live so spread out. Here in Houston, members could feasibly live 50 miles apart, which makes driving to a meeting rather difficult, depending on where it's held. Also, people's free time is so limited, and there are so many other things they need to do. Our pond society has very few people show at meetings, too, for many reasons. One thing that does get people to come is - FOOD. While I wish our meetings had a speaker or a chance to learn something, our meetings tend to be mostly about socializing, drinking wine, and chowing down.
One nice thing about a small group is you get to know one another so much better.
Do yu have the meetings always at the same place, or do you switch from home to home, or even to a public place like a garden center?