I was just in Doha a couple weeks ago and stayed at a very nice hotel. At night I'd see men and women together who were CLEARLY not married and the women were dressed SUPER scandalously. I saw one guy in a business suit escorting 2 young chicks in crazy short dresses to the elevator... don't know if he was going to his room, but no one stopped him.

That said, be very careful! I don't live there yet and don't really know how the place works but God forbid something happened to you in your room... who knows what legal recourse you could seek?!? They'd probably say you brought it on yourself for having him over in the first place... :$