Philly Net Squared
Philly NetSquared gives the following description:
Non-profits and activists around Philadelphia are increasingly using the web and social software to foster social change. Join Philly NetSquared as we bring together web innovators and social changemakers to socialize, strategize, learn from and inspire one another.
NetSquared is a national organization with chapters in many cities. Net Tuesdays are independent gatherings encouraged by NetSquared.