seating capacity; number of seats
Used for the total number of seats in a vehicle, venue, or facility.
このバスの座席数は50です。
This bus has a seating capacity of 50.
会場の座席数は十分ですか。
Is the seating capacity of the venue sufficient?
Compound of 座席 (zaseki, 'seat') and 数 (sū, 'number').