On our tour through the Unionviertel - originally a workers' quarter, now a trendy district - we are on the trail of a Ruhr area phenomenon with cult character: Trinkhalle, Bude, Büdchen, kiosk... many names behind which a world full of useful and delicious things opens up. No matter whether you're still missing milk or toilet paper after the store closes, the beer runs out at the party, you suddenly feel an overwhelming desire for a mixed...