Lewis's, first floor toilets :-)
How do you know that?

You *must* have seen some of the grafitti...

Such as

"why the wire mesh over the cubicles ?"
"to keep the queers in check"
"why ? - we look so much better in leather"

*for those who have never been, they had to put heavy gauge metal mesh
over the top of the cubicles to stop people hopping over the top to
pleasure each other...