主席【しゅせき】
head, chief, chairman, governor, president, top student, head of the class, top seat, first desk (in orchestra)
議席【ぎせき】
parliamentary seat
出席【しゅっせき】
attendance, presence, appearance
席上【せきじょう】
at the meeting, on the occasion
座席【ざせき】
seat
欠席【けっせき】
absence, non-attendance
客席【きゃくせき】
guest seating (e.g. theater, stadium), passenger seat (e.g. taxi), audience
満席【まんせき】
full house, all seats occupied, fully occupied
即席【そくせき】
extempore, impromptu, improvised, ad-lib, off-the-cuff, instant
宴席【えんせき】
banquet, dinner party
着席【ちゃくせき】
taking a seat, sitting down (in one's seat)