Been doing it for years. Far as I know, there've been just 5 times that anyone saw the girl entering or leaving. A lot of students live in my building, so there's turnover and the witnesses didn't know me and have moved on elsewhere. Except once when the witness was the nice African lady who lives in the next apt, but she doesn't speak English or French and I don't think she twigged.
Just recently I buzzed a girl in right when somebody else buzzed in a couple of visitors, two students. My escort was gorgeous and dressed in black high heels and a dress so short and tight it looked like it wanted to climb up inside her.
The two students, they were a couple, knew what she was here for and decided it was their business to stay in the hallway and goggle. So I opened the door to my apt and told her to come on in. Once inside she told me she didn't want to knock on my door and let the busybodies know I was her customer. "The hell with them," I said.
Mind you, if the witnesses had been one of my regular neighbors, somebody who knew me and could also figure out what was up, my attitude would have been very different. So my new policy is to see escorts at home only if the agency has them dress in a respectable way. For girls from agencies that favor a hot-bitch kind of style, I'm going to stick to motels.