The HJ is sometimes possible at small, legit, or storefront Tuina places for those customers the women know and like. It all depends upon privacy, how strict the boss is, and the individual woman. At a lot of Tuina places they will tease you but not to completion. (They'll refuse to touch the goods, but don't necessarily mind if you please yourself.) Building a relationship with an individual masseuse is important. They'll think you're an animal and be offended if you try on the first visit, but, once they get to know you and see your pain/pleasure, they might happily take pity on you. (Besides, in Asia, the HJ is often routine.) In short, women at these places are the very definition of YMMV. You shouldn't count on the extra, but it may be possible.
That said, there has been an explosion of new Tuina shops in the city. I think the competition is occurring not between these places and the R & T outfits, but among all these new legit places. They need an edge, so they might be more willing to please customers they know to ensure that they will come back. I've noticed that the willingness to "tease" has increased a great deal as well as the willingness to provide a HJ after some visits.
This woman probably misses you and your business and wants to get you back from all those other masseuses!