C.C.
Yes, go join Junior League! There are women of all ages and from all walks of life there - the common theme is service to women and children. There are all kinds of volunteer opportunities at Junior League, ranging from kids' health to political activism (related to women's and children's issues) to soup kitchen type events. You'll find a lot of working moms, stay-at-home moms, young professionals, and even retirees there. It's a great organization that I'd wholeheartedly recommend to any woman looking to volunteer in her community while making friends with other like-minded women.