Aryellas Yoga http://www.aryellasyoga.com/
McHenry - Description of hatha yoga practice, photographs and descriptions of several poses, schedule of classes and workshops.
Eight Limbs Yoga Center http://www.eightlimbs.com/
Chicago - Yoga classes in Hatha, Iyengar, Ashtanga, Bikram, Power Yoga, Kundalini, prenatal, and Pilates. Also conducts teacher training and workshops.