This in response to PM by someone here as your Inbox is full:
Dainam is the hotel with Gossip disco. Of course I know that place, have been there a few times.
Wow you must love that D8 hotel.
I wonder if those hotels would let you go with a photocopy of passport.
Btw, in that case I would have SMS'd the girl and said "KS muon passport, ma anh khong co o day" (hotel wants passport but I dont' have it here) and see what would happen after that. Maybe she is tied to that hotel and can't do anything, but maybe not. Maybe you 2 could have just moved on to another hotel. (or maybe that is what you 2 did!)