Unable to answer "What kind of building is this?" for osm.org/way/132233854 via StreetComplete 34.2:

Hier befindet sich kein Gebäude im üblichen Sinne, sondern der Biergarten des Gasthauses „Deutscher Kaiser“, Hausnummer 30.

A bakery of similiar fashion, the Badische Backstub’ over at Kaiserstraße 18, is marked as a bakery only, despite also serving tee and coffee and having tables inside for people to sit at. I'm not sure if Köhlers should be only marked as a bakery (thus making the accompanying café pin redundant) or if the Badische Backstub’ store over at Kronenplatz should get an accompanying café pin.