Try this recent forum thread in HK, need to register to view, and may need to level up by posting newbie Sydney reviews.

https://forum.sex141.com/eforum/view...extra=page%3D1

Found this youtube vid in the thread. https://m.youtube.com/watch?v=PXfuZ4mGEOk

Past reviews have said punting Vietnam is more expensive than Thailand and VN hotels have a no vistors "girl" policy. Look for local hotels with sauna clubs inside in District 1 and around.