Online Book Clubs at Libraries

There are so many options for online book clubs today...it's hard to keep them all in my head.  Our teen librarians at the San Jose Public Library started a group through LibraryThing, luv2read, that has had a totally decent amount of participation, though we want to push it a bit harder for the new school year to get more teens aware of it.

Another tool sprung up in my peripheral vision today.  Booksprouts is a site to help book clubs organize.  Once you're sign up for Booksprouts, you can choose to crate a new club or join an existing one.  You can make clubs private or public, let people vote on books to read, and more.  Such a tool could be used to help oomph up your in-person book clubs online presence, or to create some new online-only book clubs.  Take a look at this tool if you are book-clubber, a public services librarian, or a webmaster at a library.  Between those three groups somebody's bound to see something they think is useful.

What tools are your libraries using for online book clubs?