Blogs and Librarianship

I have been exploring the use of a blog as a means of discussing book club books with students. These kids are busy, they are on the move and they are reading. I want to engage them in discussion without pinning them down to a lunch hour meeting. They have not, however bought into the idea of the blog....what to do? I am going to post nags/reminders on the web page and some brief announcements as reminders. Hopefully it will take off soon.