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Yoga studio

The coaching: Most require teachers to have Yoga Alliance certification. Some also require additional in-house training so teachers can learn the studio's specific style.

The classes: Practice rooms are zen-like and class options abound. Studios that are part of national chains may also offer lockers and showers.

The crowd: Morning classes tend to be smaller (10 to 20 people), but post-work classes may be packed. "In big classes there's usually additional help from yoga instructors who are being mentored by the main teacher," says KayKay Clivio, head of teacher training at Pure Yoga.

The cost: $12 to $20 per class; $100 to $190 per month for unlimited classes. Ask about free trial classes.

Next: The gym