I know that apartment very well. It is kinda difficult to conduct a party in that apartment. I didn't live there, but 2 of my friends did at a sperate occations. One unique about it is that most of 1st floor people use balcony door as a front door.
One lived fartest right (1st floor) from the photo, and other friend later years lived on 3rd or 4th from the right (also 1st floor).
https://i.imgur.com/He6ny9Q.jpg