Well that depends on whether she was, so to speak, on her clock at that time. Even if prostitution were legal, if she didn’t consent but DSK proceeded anyhow, he would be stealing her services. What a crazy mixed up situation.
She's from Guinea which of course is/was also French.
I'm sure DSK has stayed at the Sofitel many, many times and was well known....BECAUSE HE IS A WELL KNOWN FRENCHMAN!! He's like a Bubba or a Carter staying at Trump Towers.