We close mid-week on Pitchup because the number of mid-week bookings we get do not justify manning reception to book people in.
This means that, lets say, somebody wanted to book Friday to Tuesday your system would tell them it was unavailable.
If I had the facility to be open but with no new arrivals, the customer could book Friday to Tuesday in the above example with Sunday and Monday being bookable but reception needn't be manned as nobody new was arriving.
The customer would arrive on Friday to a manned reception and one of the staff could pop out Tuesday morning to say goodbye.