what's the end goal? To convince the owner that the occupancy counter is malfunctioning for a couple days and then after that throw a big party? Maybe you can just ask if it's okay to host a party before renting..
My personal end goal is speculation. Each time a technology is discussed it's pretty automatic for me to think about what are its weaknesses and strengths, and how its behavior can be subverted or the same thing can be used in unintended ways.