Some information about what the club is actually about or its purpose might be helpful. Beyond 'yup we sure are going to be writing stories on this writing site, only in a club'.
How about some information about how it will be organized, why it might be interesting for people to join, the types of stories you're hoping for or...anything, really.
The most important part of writing being getting your ideas across clearly, I'd have to say the OP doesn't fill me with confidence that you know what you're doing here.
I mean, I've actually written more words about your club in this post, and in more detail, than you did in the OP. I'm showing far more interest in it than you did and I'm not even trying to get people to join. Clearly, if anything, I should be the one put in charge of your writing club.