The Fair Lawn rec center offers yoga classes in packs, the summer one just ended. Teacher is excellent and price is right but it's not as regular as going every single week. Not sure when next ones start, have to check with rec center. That being said, my friend teaches at the Wyckoff Y (she is also a good teacher, website theheartofyoga.com) and there is Naturally Yoga in Glen Rock. There is a place in Fair Lawn, Integrative Yoga on Maple Ave., sort of intense there so it depends on your level and type of yoga practice.