What is this place? More info in comments
So for context, I took this video in Dec 2023 when I got off on the wrong floor at the Union Bank Place building off O street. I was just reminded of it now after watching The Backrooms movie. I was taking the elevator up, and it stopped on this floor (I think floor 2). When I got out, I couldn't open the elevator again. I walked around and found a staircase that lead up to an area where it sounded like someone was playing the piano. You can briefly see that staircase around the 5 second mark. I couldn't go up the stairs as there was a red velvet rope blocking them. I walked around a little more and found old payphones. I then tried the elevator that was across from the one I got off of and that one worked. I'm sure this is a normal old office building, but I am curious if anyone knows anything about it or what it was / what the piano was.