You can refer to the seats in a place as the seating.
The stadium has been fitted with seating for over eighty thousand spectators.
这个体育场配备了8万多个观众座席。
The seating at a public place or a formal occasion is the arrangement of where people will sit.
She made a mental note to check the seating arrangements before the guests filed into the dining room.
她记住了要在客人们鱼贯进入餐厅前检查一下座席的安排。