Accessible Seating
They do that with the ASL section seats at regional Broadway roadhouses too. For example, at the ASL interpreted show of Mary Poppins, half of the ASL section was full. The other half went on sale on the same day of the performance (1pm matinee show). I found it funny that those poor hearing people who took the seats must have felt VERY uncomfortable to be stuck in the middle of a signing frenzy (Two of those awkward-feeling hearing folks DID move to other seats at intermission, though.)