In Saskatchewan, and elsewhere:
"U.S. prisons are also offering meditation and yoga for their general populations.
The Prison Dharma Network in Boulder, Colo., leads yoga and meditation and also sends books and correspondence to inmates U.S.-wide and around the world."
http://www.canada.com/reginaleaderpost/news/arts_life/story.html?id=5480a7f0-8c7b-4e45-b19e-be73333c14ef