Good morning Mateusz, thanks for your questions.
Actually, I added the website https://kaffeetechnik-seubert.de/ to the node, This makes clear (Menu: Service"), that they sell, rent and repair coffee machines. 
Looking at TagInfo https://taginfo.openstreetmap.org/search?q=coffee_#keys, there are several synonyms, but I do not see a tag for shops, selling coffee machines. I took my shop==coffee_machines from there.
To make my question bigger: At least in Germany, we have lots of shops selling HiFi / TV, washing machines and coffee machines, f.e . https://www.efa-kaeufl.de/ or https://www.mediamarkt.de/. 
How do we want to handle such nodes?
