Errmm...I've heard about concierge apartments. Never been to one.
I would be uneasy but I guess it depends on the concierge really. Is the concierge in the know and on the take - in which case it would be to his advantage to keep things discreet. Or is the concierge likely to get suspicious (i.e not in the know) and blow the whistle.
I've seen one established touring lady who told me that on a previous tour she had used an apartment with a concierge, and said the concierge was very helpful! (I have no idea whether she slipped something under the counter to the concierge to keep him sweet? I'd be too polite to pry into how a lady runs her business.)
At the end of the day - it's going to depend on how comfortable I am with the lady I'm going to see. Would have a higher trust level in an escort who is established and has plenty of good reivews. I'm talking about trusting the lady's ability to keep things discreet (not talking about personal integrity - which clearly any lady can have regardless of how long she's been in the business.)
Anyway, to cut the waffle - I would chance going to one of these apartments if I felt the lady knew her business very well. i would probably cancel if I felt the lady was new to this.
On the other hand I would be very unhappy visiting a hotel regardless of whom I'm going to see.
"Don't be reckless with other people’s hearts. Don't put up with people who are reckless with yours"