Richard MacCormac’s design for a London Tube station has attracted hrodes of fans. “The station manager enjoys its obvious theatricality and musicians have responded to its magic. There isn’t even any graffiti on the wall. It is a lovely thing, a happy surprise as the jaded tube traveller emerges from the fetid heat of an underground train into the regenerative joys of born-again Southwark.” The station design was inspired by music and theatre, says MacCormac. So why can’t more public buildings be this way?