Hatha and Ashtanga dominate the yoga styles in Chicago, but there are many varieties of yoga, including Kundalini, which focuses on cleansing the organs and tapping into deeply buried inner energy. When you visit Spirit, expect to do a lot of pranayama fire breathing (imagine panting like a big, excited dog) during your class with a Kundalini student on the verge of graduation. The breathing techniques and use of a gong for sound may be a bit intimidating at first, and the practice is very spirituality-based, though not in a religious way. People looking for a little more than fitness when practicing yoga will probably enjoy this style, and should invest in a six-class card for $75.