You could try Dahn Yoga.

Ashtanga style yoga is a good work out. (It's not the same as hot yoga.)

I go to Simon Says Yoga off of Sangamore. I love the environment and people - totally relaxing, but definitely a good work out. http://www.simonsaysyoga.com/

Unity Woods or Balance?

Can anyone recommend a place for yoga in Bethesda? I'm tired of my usual treadmill or even walking/jogging outside routine and would like to get back into yoga. My gym doesn't offer convenient times and I'd like to hear what studios others really like.

I don't want anything really hard-core and no hot yoga. Just a relaxed place to get a good workout, get centered and hopefully not pay a fortune.
Thanks for any recs!