I was curious if anyone has considered giving guests currently booked a couple of days a discounted extension to their reservation in order to fill vacancies? 

For example, if one guest books FRI-SUN, another from the following TUE-THUR, and a third from SAT-SUN. 

On the one hand, I would think the guest would simply extend if they have any inclination to do so, as most have plans set before-hand and don't have the flexibility to simply extend their reservation. That, at least, is my intuition. 

Then again, if they are a remote worker / student, it might be very convenient. 

I am tempted to increase my minimum to 3 days because I keep getting holes in my calendar.