Do you remember the myth of Veit the sorcerer? Yes, that charismatic violinist who plunged the entire city of Echternach into a dancing mania that even rivaled Berlin's 24-hour techno sessions.

On a sunny Jan morning, uniformed kids—from preschoolers to high schoolers—from around 50 schools in Mumbai, streamed into St Willibrord High School in Nalasopara, making their way into ...