noun
chair seating; chair seat
Refers to seating with chairs, as opposed to sitting on the floor (e.g., tatami). Also used for an individual chair seat in a venue.
このレストランは椅子席と座敷があります。
This restaurant has chair seating and tatami seating.
コンサート会場の椅子席はもう満席だ。
The chair seats at the concert venue are already full.
Compound of 椅子 (chair) and 席 (seat).