noun
tea room; tea ceremony room
Refers to the physical space where a tea ceremony is held, often a dedicated room or a specially arranged area.
茶席に案内された。
I was shown to the tea room.
noun
tea ceremony; tea gathering
Refers to the event or occasion of the tea ceremony itself, not just the room.
今週末、茶席に招かれた。
I was invited to a tea ceremony this weekend.