Unable to answer "Which customers visit this hairdresser?" – Stijlvol haar & meer (Hairdresser) – https://osm.org/node/2878230682 via StreetComplete 58.2:

It's a residential property, the hairdresser is across the street, in number 35.

Attached photo(s):
https://westnordost.de/p/226140.jpg