On a Wednesday evening, long after the school hours are over, there is pin drop silence in the sprawling premises of a SoBo school. But once the door creaks shut and the assembly hall is crossed, the elevator takes us to the top floor where soft voices singing in unison become louder and louder.

A passage opens into the brightly lit auditorium area, where a group of actor-singers are bringing ABBA's popular track, Thank You for the Music, to life on stage. It's fitting; because everyone listens when they start to sing.