3HO Yoga Center http://www.3ho.com/
Sterling - Kundalini yoga center is a member of the 3HO Foundation, a non-profit organization. Offers yoga classes and events, guidelines for nutrition, health and conscientious living.
Authentic Yoga http://www.authenticyoga.org
Vienna - Information on classical yoga instruction and workshops. Pictures of poses and online ordering of books, audio and video materials.
Edge Yoga http://www.edgeyoga.com
Arlington - Offers traditional and non-traditional classes and workshops that incorporate elements of Vinyasa, Integral, Ashtanga, and Anusara yoga for all levels.