The police probably dont raid it as a) Its a big drain on their time and resources and b) They close Cuddles and Bubbles opens. They close Bubbles and Cuddles 2 opens.
They probably know who the girls are that work there, and take the view that there are more pressing matters to occupy them.
As I have said in a previous post, parlours are not for me. Call me paranoid, but I fear they are riddled with covert cctv cameras and I dont fancy an appearance on Youve Been Framed.