An American tourist in London decides to skip his tour group and explore the city on his own. He wanders around, seeing the sights, occasionally stopping at a quaint pub to soak up the local culture, chat with the locals, and have a pint of stout. After a while, he finds himself in a very nice neighborhood with big, stately residences...no pubs, no stores, no restaurants, and worst of all NO PUBLIC RESTROOMS. He really, really has to go, after all those Guinnesses. He finds a narrow side street,…