Not so much topless as stark naked.

From Trying to Please by John Julius Norwich.  Page 101.  

We stayed that first night in the Aletti Hotel, but the next morning discovered that the exotic Moorish house where my parents had spent most of the previous year was untenanted, so the three of us moved in. I must have been distinctly de trop, though I was never allowed to feel it; on the other hand Bloggs had his work to do and could not be with us all the time—a fact which enabled my mother and me to spend an unforgettable night in a little town on the very edge of the desert called Bou-Saada. There, in the Transatlantic Hotel, we watched as the local girls, not so much topless as stark naked, danced for our delight—an entertainment which I found strangely disconcerting; and there too, the following morning, we called on Miss Fitzsimmons.