I lived on a block with a house of prostitution

There was a house of prostitution on my block (which only had six houses) near downtown Baltimore in the late 1980s. I asked the guy next door to it how he knew. He said he saw five guys coming and going over a five-hour period. There were frequently people hanging outside late at night. How come I didn’t know? I said I only got the pizza and Chinese food flyers. They weren’t there long. My understanding is that they didn’t pay the rent. I called it the house that was a house, not a home.