Unable to answer "What are the opening hours here?" – Między Drutami – https://osm.org/node/10914468451 via StreetComplete 56.1:

Thuesday-Friday: 12:00-18:00
1st and 3rd Saturday of the month: 10:00-14:00
Monday: Closed

Attached photo(s):
https://westnordost.de/p/197492.jpg