I just can't imagine any reputable MP or for the matter some that are not so reputable putting cameras in the rooms. What is the point in doing it? There is no upside here only downside. If they want to stay in business, and we can only suspect they do. No business owner in his or her right mind would take such a risk. They are first and foremost want to stay in business.
As Sheik has mentioned in a previous post, the camera's in the studios generally are located at enterances of the place for security and for "keeping the ladies honest". That is the only reason, why cameras are used. As for peep holes, some places have them and some don't, bylaw says the studios must have them, but if the place is generally acknowledged by bylaw officers as "clean operations" do not push the issue if they don't have peepholes. These are generalizations, however I hope it helps.