Imagine the scene: amidst the warm aroma of freshly roasted cocoa beans, a chocolatier watched by an entranced audience creates truffles, ganaches and pralines perfumed with fresh herbs, strawberries and citrus, some flavoured with beer brewed in the next street. On the mezzanine above, an exhibition of art also created in the neighbourhood has drawn another crowd keen to critique the works and talk to the artists.