Kirtan is a yoga practice. It is used in these three overlapping paths:
Bhakti Yoga, often called the yoga of devotion, Nada Yoga, the yoga of sound vibrations and their effects, and Mantra Yoga. Mantra literally means "the force which liberates the mind".
To all of you Cleveland-drumming-lovers, you might want to try kirtan.
2319 Lee Road
Cost: Donation based
This website explains a little bit more: