I have now attended two Museum Yoga classes at the Heard and had a great experience - what a wonderful idea to practice yoga amongst an art exhibit! The yoga class itself is complimentary (however, you must register ahead of time), but you must pay for admission to the museum. If you come with a friend and bring your own mat, it is buy one get one free admission...and even better, if you stop by the library and checkout a Heard Museum Culture Pass your admission for 2 is completely free - bonus! They mentioned offering additional classes indoors and outdoors throughout the museum...can't wait to check more classes out!