The glory days of 'The Lido' at the Ambassador Hotel.
eBay
"Ambassador Lido Club, Feminine Conditioning"
A small sign for "Gentlemen's Dressing Rooms' is visible at far right. (can anyone decipher the orange sign in the distance on the left?)
....could that be Joe Roig in the black turnks?
my enlargement above is in two pieces. Here's the slide in one piece if you want to right click it.