男だん性せい用ようパウダールーム

noun

men's changing room; men's powder room

Typically refers to a men's changing room in a gym, fitness club, or similar facility. The term パウダールーム is often associated with women's restrooms, so 男性用 clarifies it is for men.

• ジムの男だん性せい用ようパウダールームで着き替がえた。

  I changed clothes in the men's changing room at the gym.