All the talk about "raids" was a bit over the top. I know it can be a bit of a word game but I would not characterize what happened as a "raid".
Under the by-law, Body Rub Parlors are subject to random, unannounced inspections from City Health Inspectors, By-Law Officers or the police at any time.
What happens when it is WPS and this happens to all of them, is the cops will come in and check all the staff on the premises for proper licenses and walk through to make sure there are no violations occurring such as drug or alcohol consumption, nudity or sexual acts. They also have the authority to ask any one found on the premises to produce proper identification and they may check you for outstanding warrants, etc. Then they leave.
I personally would not characterize it as a "raid". The SWAT team doesn't come crashing through the front window or the ceiling. Maybe a few tickets are written but no body is usually arrested unless they are wanted for something else. It is more of an inconvenience and perhaps even meant to scare the shit out of a few of the patrons who are there.