I was there a couple of months ago, weekday late afternoon.
I thought Doublestraat was a bit of a horror show to be honest with lots of monsters, although I did indulge in a reasonable looking Hungarian girl for €30, who’d previously worked in a parlour in Manchester.
Geleenstraat was higher quality but a ghost town, I punted a very pretty Romanian with a great body for €50.
They’re about half a mile apart easy to find and not far from the City center.