I always feel that way too - like I just don't fit in anywhere. I know that a lot of it is my own insecurity but that realization doesn't help the situation.
I think that you should give it another try or two to go the the book club and actually get involved in the conversations. It seems that there were some topics you could have chimed in on. See if that loosens you up and warms the other ladies up to you. I know its hard to do that but you are keeping sober - nothing is harder that that so I know you have great strength & resolve.
If after you give it anothere try you still feel uncomfortable then maybe you do just need to seek out different groups.