Most importantly, what you get from a greasy spoon is a certain kind of smell that has been almost legislated out of existence. It is cigaretty, certainly, and it also has the catch-throat quality of smoking fat. It is a warm, companionable fug that rises to meet you as you step through the door on a late autumn day and it is how public places used to smell in my childhood in the 1970s. It is real, it is human, and it beats anything I know.