Time Out says
Located in the Bockenheim district, Bockenheimer Weinkontor was once a blacksmith's workshop—you’ll need to cross under an arched cast-iron gate and descend down a stairway to reach it. This hidden gem of a wine bar draws wine enthusiasts during both summer and winter with a cobblestone courtyard either blooming with green foliage or glowing from the log-fire fireplace. Space for around 150 people consists of booth seating and bar stools topped with colorful pillows; simple wooden planks form the bar, at which a section of 50 German and European wines from mostly family-run wineries start at just 4 euros a glass. Flammkuchen (German pizza) and small plates of cheese, salami, and vegetables with humus stave off hunger.