It does not matter is the spa is "legal" or "illegal". This is a municipal by-law concept. If prostitution is occurring in the establishment and you are present in the establishment you can be charged under the criminal code. You need only be present in the establishment. You don't have to be caught in the "act" to be charged. You only need to be found in an establishment that sells sex. Even if you are found fully dressed with your winter coat, hat, gloves on in a massage room you can be charged as being found in a common bawdy house. The whole issue of prostitution is now before the courts so Toronto enforcement may be less today, however one should not be complacent. Complaints by near by businesses, politicians, or residences can result in enforcement of current criminal code provisions. Simply being in an establishment that offers sex for sale can lead to arrest. FS, HJ, BJ all = sex. Avoiding high traffic establishments near residential areas, spa's that publicly advertise "erotic' services or spa's in busy commercial centres is still a good practice.