I and my friend came out from our class and were going to powder our noses. After reaching near to bathrooms, we found that doors of all bathrooms were closed, meaning that some students had already entered the bathrooms. My friend asked to me to describe this situation in English language. 'All bathrooms are packed', I said to him, adding that you might also say all toilets are being used. Was I right in describing the above mentioned situation? How will a native English speaker describe this situation?
All the (toilets/cubicles/stalls) were (busy/engaged/occupied/being used).
There are a few dialect differences. Using "stall" is American, as is "bathroom" (when referring to a place without a bath).
You could also use a negative statement "None of the toilets were (free/available/vacant)"