Because I spend some time each month checking the visitors and such at each bookstore in the area, I have noticed that there are a growing amount of book groups that read both YA and romance. As someone who loves reading but resisted book groups because they always wanted to read the things that I did not (or told me I didn't have to read, which seemed not the point) this excites me.
I stuck a roundup of the ones that I am aware of - heck some of them I even participate in - over here.