I used to work at Red Lobster PT along with my FT job. The restaurant closed at 11 p.m. but if someone came to the door at 10:55 p.m., we were told to let them come in.
From their ordering, appetizer, drinks, dinner and dessert, plus relaxing afterwards, this could put us in the dining room to almost 1:00 a.m. and you could not rush the customer(s) and had to allow them to fully enjoy their meal.