We have deployed a new feature for Webready called Closed to Check In and Closed to Check Out.

A property manager can block check-in or check-out on particular days of the week or for a specific date period. The configurations are added in the editor. 

You may find the setting here Editor => Global Settings > Bookings > Closed to Check-in / Check-out.

In the below image, "Weekday" and "Friday" with the "Closed to Check-out" option are selected. 

Now, if guests try to make a booking, all Fridays will be unavailable for Check-out but Fridays will be available for Check-in.