Magic moment at the Waldorf hotel

ThoughtWorks had its party on Friday night at the Waldorf Hotel in London.  Seventy or so years ago when my grandparents were married they stayed there on their first night.  Fifty years later my Grandfather was going through some old paperwork and dug out the original receipt from their stay.  To celebrate their fiftieth wedding anniversary he wrote to the Waldorf, booking a room and enclosed a copy of the recept for their interest and ammusement.  He thought nothing more of it until they arrived.  They were given the same room that stayed in 50 years before.  The following day when they checked out and my Gradfather was settling the bill, something was wrong.  ‘This can’t be right’ he said, ‘surely you’ve left a nought off’.  But it was right.  The Waldorf were charging him the same price that he paid fifty years previously.  That was a real magic moment.