You're overthinking it.
Just look at large hotels that don't have an elevator that needs a card.
All the rest is superfluous, receptionists really don't give a damn.
Btw, there are quite a few websites that allow you to rent by the hours rather than for a full day.
All this being said, if I rented for a night I would never check in a couple of hours after, it would just seem extremely strange.
Never had an outcall, just common sense