Well, as a non-group person, I certainly found that the required group work is school was quite enough. I have always been fine at it, but it wears me out. I need lots of down-time to recover. It just would never occur to me to put a non-group person into an extra-curricular group activity. Let them have and individual activity that gives them some space where they can stretch their wings or just settle into themselves and relax a bit before heading back to another inevitable group.