Argentine Tango: NJ, NY, PA
New Jersey
ArgenTangoDancers (Cherry Hill)
http://www.argentangodancers.com/
Firehouse Tango (Maywood) http://www.firehousetango.com/
Red Bank Tango (Red Bank) http://redbanktango.com/
Tango Asado (Brookside) http://www.tangoasado.com/
Tango Pantera (Middletown) http://tangopantera.net/
Two for Tango (Bergen)
http://www.2fortango.org/
New York
Richard Lipkin's Guide to Argentine Tango in New York City
http://www.newyorktango.com/
Philadelphia
Seven Day Guide to Folk, Social and Traditional Dancing in and around Philadelphia (Tango included)
http://www.phillydance.com/