Ugh, Actually I think Emiel's link just had a couple of bad characters at the end. It's the same link: https://www.airbnb.com/terms
For the benefit of others, here's section 8.2.2 (Thanks again @Emiel1 !!!):
"8.2.2 You agree to leave the Accommodation no later than the checkout time that the Host specifies in the Listing or such other time as mutually agreed upon between you and the Host. If you stay past the agreed upon checkout time without the Host's consent (“Overstay”), you no longer have a license to stay in the Accommodation and the Host is entitled to make you leave in a manner consistent with applicable law. In addition, you agree to pay, if requested by the Host, for each twenty-four (24) hour period (or any portion thereof) that you Overstay, an additional nightly fee of up to two (2) times the average nightly Listing Fee originally paid by you to cover the inconvenience suffered by the Host, plus all applicable Guest Fees, Taxes, and any legal expenses incurred by the Host to make you leave (collectively, "Overstay Fees"). Overstay Fees for late checkouts on the checkout date that do not impact upcoming bookings may be limited to the additional costs incurred by the Host as a result of such Overstay. If you Overstay at an Accommodation, you authorize Airbnb (via Airbnb Payments) to charge you to collect Overstay Fees. A Security Deposit, if required by a Host, may be applied to any Overstay Fees due for a Guest’s Overstay."
Still, question remains whether this can be really reinforced by AirBNB.
Plus in this case, the employer (guest who booked) could easily say they didn't actually stay in the place, just us holding their luggage for the night. What to do in that case?