It's no secret that London is addicted to coffee. In the UK alone, some fifty-five million cups are consumed each day. This newfound public interest has spawned hundreds of coffee shops, specialty roasters, and even dedicated festivals. It is, however, often forgotten that London has a history of coffeehouses dating back to the 1650s--populated by intellectuals, writers and businessmen, these were hothouses of debate, community-gathering places, and...