First off, sweetiepie, the Criminal Code of Canada doesn't deal with summary offences (with a few exceptions). Second, commercial establishments are regulated at the provincial level, not the federal level. But with massage parlours (along with many other establishments), Ontario delegates regulations to municipalities. It is then the responsibility of each municipality to come up with laws to regulate massage parlours. Public health inspectors can come knocking anytime, and if they find out that an MP is unlicensed or that a holistic centre is offering "body-rub" services (as defined in the Code), they have every right to charge the operator. For the most part, the police only gets involved when a health inspector is denied entry into an establishment.
But sweetiepie does have a point that licenses are required. Just look at the Toronto Municipal Code, Chapter 545: Licensing.
The requirement to be licensed: 545-2
The listing of offences: 545-7
These by-laws are definitely enforceable, and anybody caught can potentially face serious monetary fines. Although in reality, the fines that actually get handed out are not too severe, save for repeat offenders. And even though there's a possibility of imprisonment, it would only happen in extreme circumstances.
So, sweetiepie is right in saying that a licensing is a legal requirement for MPs, but a violation of this requirement is not a criminal offence; it is a summary offence with (mainly) financial penalties.