I belong to Reader’s Digest book club on Facebook. They’ve been picking really great reads and the discussions are always interesting.
I also belong to Sarah Selects on Amazon Book Clubs. She has also been picking very good, new release reads and has weekly discussions, as well as author interviews.
I also subscribe to all the other book clubs available through Amazon, but they don’t have actual discussions, so usually I’ll just note their book picks on my TBR list and get to them when I get to them, if the book sounds interesting, where as the first two, I’ll read the book without learning what it’s about beforehand because of the discussions. I also have found a lot of new genres and authors this way whereas if I had read the description of the book first, I never would’ve gone for it myself.