Chairs sold per date
Seat 14 taken on Friday is on sale again for Saturday.
In the paid plans
Read the manual
The plan belongs to the hall; what is taken belongs to the date. The same map is shown for every showing, with only that night’s seats marked as gone.
The customer picks the chair they want on the date they want, and two people cannot end up holding the same one.
More in Seating
Draw the room once and sell the chair rather than the number.