I'd be very surprised if less than half the bookings were for sex, amateur or professional.
Meanwhile, in NYC there are plenty of options for "hourly" hotels that get you a room for 2-3 hours for 50-60 dollars, which is about the rate of Breather.
Though, uh, as Ian Malcom put it in Jurassic Park: "Life finds a way"
I was intern at research facility that had this story as part of the local folklore: male researcher and female researcher stayed the night to supervise long-lasting experiment, fire inspector was doing rounds and walked upon them having sex. He reported this to the director of the facility. Director said "I don't see how fire safety was affected" and dismissed the complaint.