Unable to answer "Which customers visit this hairdresser?" – on level 1: Maya Hair Salon (Hairdresser) – https://osm.org/node/1841956731 via StreetComplete 58.2:

Hair cutter is for all genders
Is on second floor, not first
Hours are 10am-8pm mon-sat closed sun

Attached photo(s):
https://westnordost.de/p/226431.jpg