I just don't get the premise of the question. If a lady is hired as GFE, that for 99% means sex for hire. Sex is expected when hiring a girl who offers GFE. If you are hiring a girl for a non-sex date, then it becomes WE-- Wife Experience
My point is that both man and woman know GFE means sex. If your question is about a lady who only offers time together without anything of a sexual nature, then there is no money for sex. I'd be careful though b/c even if she nude models and you jack off, it could be considered a sex for money thing.
As for the social companionship angle, I doubt LE would set up a sting that would take 1 to 2 hours before something naughty may or may not happen. Although, I could see where a make cop would wait out a 2 hour real date (dinner, companionship, etc) and wait it out for the girl to make a move.