Meet Up Groups are one of the most popular ways that people can develop groups with people (who live in the same area) who share similar interests or perspectives. It may be as simple as "Who wants to go bowling on Saturday night?" to groups that provide validation and support, e.g. divorce groups, groups for Asian Americans, groups that discuss adventure travel, single parents). Contains ratings of the groups, and the opportunity for people to define and develop their own group.
SWWAN - Single Working Women's Affiliate Network - is dedicated to "Enhancing the single lifestyle...and making the world a better place for everyone". Have originated and celebrated Single Women's Working Week (usually occuring in the late summer), and sponsored benefits.