Yeah I like the idea of having an organized club to put on these events but I feel like every other month this exact idea is being proposed. And not only that but there are quite a few of these groups which exist already (google "site:ycombinator.com meet-up"). No point in creating an undifferentiated alternative. I think I prefer an ad-hoc group where YC'ers can just get together once in a while, drink coffee and hack. Sounds fun, doesn't it?