I enjoy working in central London for many reasons – chief among them the chance to see some genuinely different sights. One lunchtime Kim and I met on the Victoria Station concourse for lunch, we were officially going to find somewhere to sit for lunch but something even better turned up. As I was heading towards our meeting spot I walked past a very elegant couple in tux and ball dress, unusual to say the least at 12.30 in the afternoon. I found Kim and on the way back saw this couple standing by a Haagen Daaz promotions stall with another couple in elegant dancing gear. I made Kim lurk with me as I watched them organize something, turn on a stereo, and then start to tango and salsa around the stand. I was enchanted – one couple were a distinguished and very tall man with grey hair, his partner a tall stunning blonde in a strapless red ball gown. The other couple were shorter than me, two slight and very dark South Americans, the gentleman in a tux, the woman in a tiny red velvet d...