Binary Yes/No option to allow people to book within the set minimum booking notice window for time slots that have open seats.
This will naturally consolidate bookings allowing greater efficiency for existing Tidycal users, while also offering greater convenience for customers.
For instance I have minimum booking notice set to 24hrs and an appointment booked for 2pm tomorrow with 2 seats left. The next person trying to book could book the 2pm, or choose something farther out.