A few years ago I was in a "trendy" bar, I'll have to try to remember associated facts to be sure but I think it was in downtown Minneapolis. Along one wall was a narrow somewhat raised-above-table-level counter along which there were bar stools for patrons to sit and drink/munch on the counter. Later when I went into the mens' room it became obvious that the mirror along the entire top of that counter was one of these one-way jobbies and I could stand by the urinal holding my personal property while being within inches of eye to eye contact with this very attractive brunnett that I proposed to as soon as I walked back into the bar ...since I didn't know her name, she declined
and we lived happily ever after.