Today I had a lazy morning before setting out at midday for my lunch date! My destination was Sobrino de Botin, in the centre of the city. It is in the Guinness Book of Records as the world's oldest restaurant, founded in 1725. It's also very popular. I'd gone on line to book it Friday night. The first available slot had been Monday night at 23:15 - far too late for me. Fortunately th...