The Green Street Vegetarian Club, founded in Harrisburg, PA in 1999, includes members who are vegetarian, vegan and non-vegetarians who are interested in learning more about vegetarianism.
They host regular events and casual meet-ups that are listed on their Web page or monthly newsletter. Annual club fees are very reasonable.
The organizers are warm, friendly and well informed. I can't think of any polite person who wouldn't be welcome in The Green Street Vegetarian Club.Pros: regular get togethers, friendly to all comers, nice events