Sloane Square: 1963 & 2009.

The first place John lived in London was the Royal Court Hotel on Sloane Square. Though it's changed its name, the exterior looks much the same today as it did in 1963 when the above fan photo was "done", give or take an awning or two.
Sloane Square, in the form of resident horsey, pearl wearing, ultra-materialistic (and vacuous) young women, eventually came to symbolise certain aspects of 1980s London, much in the way that nearby King's Road, in the form of (insert your own cliche), did for the 1960s. So it goes.