Hiding in plain sight in Sydney’s city centre, inside the Harry Seidler-designed building fondly known as “the mushroom”, the Commercial Travellers’ Association (CTA) Club has remained unmodernised, unrenovated and un-bought-out for 46 years.

That the building still exists is surprising enough. That it is still operating in the same guise as it was in 1977 is a miracle in a city that’s far more inclined to sell heritage buildings to the highest bidder for luxury apartments or cool new restaurants – or get rid of them entirely.