When the Billiards Room is open, and which days it's fully closed. Check-ins are refused when the room is closed, and anyone still checked in is automatically checked out at closing time. Changes apply straight away — no app update, nothing to deploy.
The daily window. A member can only be checked in between these times, and a check-in never runs past closing.
Full-closure days — the two Eid days, or any day the room isn't running at all. Nobody can check in on these days.
No closed days set.