We checked in at about 3 am as we had a night flight to Athens. Walking through the streets to the house was the scariest experience we have ever had. When we found the building, we had to ask the drug users to step aside from the door so we could get into the building. We avoided eye contact or any direct or assertive expressions to prevent any attack, anything could happen as they were high. We were afraid to go back through those dangerous streets at that time of the night so we waited until the sun went up and there was no one in front of the building and at about 7 am in the morning, we left the flat and didn't come back. We hired a room at Athens Tiare Hotel for that day.
Inside the flat is completely opposite the neighborhood, it was well designed and the goods looked new. However, there were hair and black pieces of dirt on the bedsheets. It looked as if they weren't changed. The pillows smelled bad too. The toilet seat was dirty.
I have never had such an experience before, I always inspect carefully and take the host's instructions and warnings about the flat or the area, respect the host and use their flat as if it is mine. However, I wasn't expecting such an extreme neighborhood and close contact with drug users.
Thankfully Airbnb was with us and very supportive during the process.