According to Official Guinness Records,
The largest dhol drum ensemble was achieved by 1,356 participants in an event organised by Art of Living Foundation at Shivaji University Ground, Kolhapur, India, on 21 February 2011. The concert was attended by 200,000 people and lasted 20 minutes.
For a complete list of 2011 records, please visit 2011 Guinness Records in India.