I have a Steinway grand piano for rent in my music room of my apartment in Berlin-Kreuzberg (25 m2). The piano is a 1973 A-188 (Hamburg) with a very beautiful and colorful sound. It is tuned and maintained by one of the best Steinway technicians available.
I have some flexibility regarding the dates and times - please let me know.
You find a video made in the room here: https://www.youtube.com/watch?v=3vtgbwDYhqo