noun
A room or designated area for changing clothes, such as in a gym, pool, or clothing store.
プールの着替え所は混んでいた。
The changing room at the pool was crowded.
試着した服を着替え所で脱いだ。
I took off the clothes I tried on in the dressing room.
Compound of 着替え (changing clothes) and 所 (place).