KanjiJLPT N4
Seat

seat, mat, occasion, place

Mnemonic

Out on the veranda, twenty chairs are lined up for a grand banquet. A towel is draped over each one to claim a seat — the fanciest reservation system ever. Find your towel, find your seat.
Additional thoughts
Picture a long porch with exactly twenty chairs, each with a neatly folded towel marking someone's assigned place. The towel-on-chair trick is a universally recognized way to save a seat.
Quick recall
A towel on each of twenty chairs across the veranda reserves every seat.

Details

The keyword for 席 is seat. This kanji refers to a place where one sits or a designated spot for someone, such as a chair, a position at a table, or an assigned place in a venue. It extends beyond physical seating to encompass one's place or position in a gathering, meeting, or occasion. By further extension, it can also refer to the occasion or gathering itself, as in a banquet or a formal setting.
On'yomi
せき
Kun'yomi
むしろ