Think the bro who posted the Review went to another joint, not Yong Jian.
Firstly, he mentioned he saw a girl standing at the stairs - er, YJ is on the first level walkway, no stairs nearby, unless you are talking about the stairs next to it that lead to Imperial Court Residences?
Second, the doors in the renovated YJ each have a glass panel in the middle that enables the person outside to check on the proceedings in the room - govt measure to weed out kinky business.
Unless you are telling me the lady HJ you despite the possibility of passers-by seeing you both in the act?
Yeah, then someone's going to get the sack soon.