Retail innovation, where people can shop alone after staff have gone, is helping vital community hubs survive Retail innovation, where people can shop alone after staff have gone, is helping vital community hubs survive O nce upon a time, every German village had its own Tante Emma laden (Aunt Emma shop), a family-run hub of community life where local people bought their groceries at affordable prices and shot the breeze with their neighbours. But in recent years the loose network of small