Harbhajan Singh Khalsa an informal "Holy Man Jam" at the University of Colorado at Boulder with Swami Satchidananda, Stephen Gaskin of The Farm in Tennessee, Zen Buddhist Bill Quan-roshi, and other local spiritual leaders. A few weeks later, he organized a gathering of spiritual teachers to engage and inspire the 200,000 attendees of the Atlanta International Pop Festival on the stage between the performances of the bands. All through the 1970s and 80s, as the Siri Singh Sahib of Sikh Dharma, Harbhajan Singh actively engaged in and chaired numerous inter-religious councils and forums, including the Inter-Religious Council of Southern California, the World Conference
Harbhajan Singh in further controversy after an 2008 Indian Premier League (IPL) match between Mumbai Indians and Kings XI Punjab at Mohali in April 2008. While the teams were shaking hands, he slapped Punjab paceman and Indian teammate Sreesanth in the face. Harbhajan, who had stood in as the Mumbai captain for the first three matches of the tournament to that point, all of which were lost, had apparently been angered by Sreesanth's aggressive sending-off of his batsmen as Punjab coasted to a decisive victory. The Kings XI Punjab lodged an official complaint to the IPL. The match referee Farokh Engineer found