I’ve visited a couple of times. Typically a female answers the door though there is a male TCM doctor on-site.
At least in my experience the ladies( 2 regulars) are pleasant looking and in their 40/50s.
FS is not on offer. For one thing, shower facilities are absent.
You might be able to get a full body massage on request.
I wouldn’t worry about the male doctor at all -unlikely you will run into him.
If the ladies are busy and he answers the door, just say you will return later.