Hindustani classical vocalist Mahesh Kale enthralled hundreds of music lovers at his annual Diwali Pahat concert at Sion. Mumbai: Hundreds of music aficionados gathered at Sion’s Shanmukhananda Hall on Sunday morning to attend Hindustani classical vocalist Mahesh Kale’s annual Diwali Pahat concert, a musical celebration that has become a much-awaited Diwali tradition.