Ok, so my short report!
Didn't get back to the hotel til after work which was a lot later than anticipated. There were two clubs, Zinc downstairs and a second in the hotel lobby which was geared towards the Indian population on Thursday nights. I had a discreet chat with security, one of whom got a bit shirty but the second guy was quite helpful.
Basically you can get guests in but some of the security can make a bit of a scene about it. As i was chatting to one security guy another shouted across the lobby at another guest who was bringing a Filipino into the hotel, this obviously made everyone in lobby look over. The Indian nightclub had some EE girls in but they were ridiculously expensive even by Dubai standards.
Zinc had a bit of a variety with a few Africans and orientals hanging around. The Africans could be quite aggressive grabbing you and almost dragging you out the club. The orientals more discreet but I found you had to approach them and again they were asking quite a lot.
You can arrange women through some of the security guys to keep it discreet but you wouldn't really know what you were getting until they rocked up to your room.