What was this place before? School, Sanatorium for rich drunks?
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thank you.
it was a musical instruments shop (factory), as far as I know.
Now a small update.
Starting the epoxy floor saga !
First repair the badly damaged floor in the mc main room.
Started on the wrong foot as usual, rented a concrete grinder ... that didn't go so well, the holes were too deep and I was too enthusiastic.
A few hundred $ slap in the face and I realized I must man up and fix the floor , First google how to do this... found the materials, another few hundreds blown and floor looks much better (not done yet)

this smily describes perfectly what concrete repair and finishing actually is.. kneel !!!!!
update, finished with the floor repair and egalisation .
Going to let it dry for a few days and grind it down again next week.