The bathroom, restroom or toilet are all vaild in company and you want to be polite. Also known in slang as "the jacks" or "the bog" for more informal usage.
...Occupied -_-
Occupied
If you need to then call for somebody. not call somebody yell for somebody. that's what I do.
write their home phone numbers on mens public restroom walls,then transfer to another school.
NO! Absolutely not! If it's not allowed in the plane why would it be allowed in the bathroom?
They use restroom
A hy-pot-en-use.
The recommended heights for the nurse call devices in restroom
Some people don't realize the germs that they are spreading by not washing their hands after using the restroom.
it is a trigon or as most people call it triangle
No unless if it is a public place that has a fair number of people. Some restaurants only have one toilet/restroom so females and males will just have to share, your house only has one or two restrooms and you ( hopefully) dont have a sign saying female or male restroom so no. But you can call someone to have a look and check if your not sure if your place is considered as having a constant number of people.