a legit therapeutic massage, then ask the hotel concierge to set it up for you.   If you're saying "therapeutic massage" with  a wink, and you're REALLY looking for an old Southern Gentleman's dick to get sucked or jerked, then there are plenty of ladies that do outcall in Vegas and will begin with a massage.  Did you do a TER search yet with the appropriate filters?

Massage Therapists

I am in LV a couple times a year and the strip hotels all have their own spas that they promote. When asking in the past, they all have the same line, "We do not promote or support outside mobile massage companies".

I am indeed looking for 'Therapeutic Massages'. Mobile massage services are fairly common in the UK and I just cannot seem to find the same level of service in LV.  

I enjoy the touch of a beautiful woman during a massage with nothing more expected or requested. When it comes time for something else....yes, I'm sure I can contract with a capable provider.

But to get you going, check Gia..Known her for years and is a quirky cool, attractive young lady.