I was there today. It's not discrete at all. It's a big beautiful spa with a huge sign in the front gable of the upper roof. It is the most beautiful spa I've ever been in.
I saw Apple, and then was invited to join all three girls and the MMS Mary for lunch. Including the MMS, they were four of the sweetest and most unjaded girls I've ever met. I don't think any of the working girls are over 30, and the MMS Mary is a sweetheart. Mary's English was very good also. She had to use translation app a few times, but she gets by very well without it.