Underground Concert

You swipe your ticket. You descend the escalator and round the familiar corner into the cavernous main connection hall.

Except you're not assailed by that bloke with the saxophone. Instead, lined up in a carefully chosen area is a string quartet, a choir of professional singers or even a full orchestra. Paid, of course, for their time; and not playing too loudly, and not playing anything excessively discordant, so that all who pass by feel stresses and strains float away and a calmer sense of being caress their tired minds.