Yoga Meditation

Can anyone recommend or refer me to a yoga studio they consider to be reputable? I know of Dahn Yoga but a monthly charge doesn’t appeal to me, I rather pay by class or have the opportunity to do work exchange… I’d be willing to go out to Wheaton or Glen Ellyn. Has anyone tried Bikram Yoga in downtown Naperville? What did you think? Hot Yoga isn’t necessarily what I’m looking for but I’m open to it..