Yoga is all about community, and being "free"-spirited, so it makes sense that these spots offer donation-only stretch-and-om sessions. You give what you can (which everyone understands, is sometimes nothing at all), and you take a great, relaxing workout with you. (Check the sites for specific times and dates this option is offered).

Runyon Canyon Park, 2001 North Fuller Avenue (near Franklin Avenue); 323-665-5046.

Santa Monica Power Yoga, 522 Santa Monica Boulevard (near 6th Street); 310-458-9510.

Bronson Canyon Yoga, 3200 Canyon Drive (in Griffith Park); 310-902-6746.

Yogala Echo Park, 1840 Echo Park Avenue (near Ashmore Place); 646-489-3422.

The Hub, 2001 South Barrington Avenue (near Mississippi Avenue), Suite 150; 310-575-4200.

Bikram Yoga Silver Lake, 3223 Glendale Boulevard (near Edenhurst Avenue); 323-668-2500.

Photos (clockwise from left): Via Runyon Canyon Park, The Hub, and Bikram Yoga Silver Lake