What makes a restaurant hot? Whose name do you need to drop to get a table? Why is one place booked solid for the next nine months while somewhere equally delicious is as empty and inhospitable as the Gobi desert? Welcome to the restaurant business, where the hours are punishing, the conditions are brutal and the Chef''s Special has been languishing at the back of the fridge for the past three days. This is an industry plagued with obsessives. Why else do some chefs drive themselves crazy..