Book clubs: A good use of my time? Or just plain fun?

As a first time novelist, the publishing process is new to me, and so I'm not quite sure what typical authors do to promote their books, communicate with readers, and make themselves available to the general public. I have wonderful people at Broadway working with me, but I'm also trying to do my part, using Twitter, Facebook, and this blog to reach out to potential readers.

Recently, a new opportunity for outreach and promotion has arisen: book clubs. In the past month, I've received requests