I think there a few, however the one that jumps out for me is 210 Lloyd Manor in Etobicoke, they advertise on Kijiji quite often and I am sure they have been reviewed here.
Your basic AMP, no question HE is available.
Very very discrete entrance : it is on the second floor of the office building at the end of the Metro Plaza. Lots of parking of course as there are many stores in this plaza.
The entrance to the offices is at the north end. There are so many other offices here, no one will know why are you are going in there.
I will say there is a sign in their window I believe, however at least you aren't entering directly into their spa.
Silhouette used to be great ( one of the only good things ) as all they had was a small visa sign with their hours.
Now of course I think they have more signage.
I have never understood why places insist on bright, obvious signage. I would assume only a small portion of their business comes from walk-ins and drive bys.
The majority must be from advertising and word of mouth (no pun), and I am sure bright lights and signs keeps away those of us who don't want to be seen going in or coming out.