Saw this on the Washington Area Spiritual Network calendar: www.wasn.net
Kirtan with Vamadeva and Friends happens every Sunday . Suggested donation is $10. Greenbelt OM Yoga Studio at 133 Centerway
For info on the studio and for directions, visit their website: http://www.greenbeltom.com/ Best reached by car since the buses from Greenbelt metro don't run on Sundays.