a women's toilet in a public place or building such as a hotel or restaurant

I'm just going to the ladies. 我正要去女洗手间。

Is there a ladies on this floor? 这层楼上有女厕所吗？

We spent a lot of time in the ladies, doing our makeup.

Where is the nearest ladies' room?

We managed to find a ladies' toom at the back of the department store.