Kim, you are very bad!
About 4" square, to the side of the WC in each cubicle. There is a row of air holes at the top of the recess. What's it for? Is it an ashtray? This has always been a no smoking site since it was built.
Posh/secretive gloryholes?
What is an exposing dribble?
For exposing dribbles.
Has anyone tried inserting something into one of the holes?
I think we need a photo