When I'm in my hotel room the door is locked. If someone tries to enter they won't be let in unless I expect them. Maids do not service occupied rooms, and they have their own key cards anyway. For everyone else there is telephone.
I cannot imagine that all 11 trained and armed agents would unwittingly let someone who they don't know enter their rooms in a volatile country. If strangers are trying to enter all rooms, that's a coordinated attack. I imagine that SS agents are instructed on what to do if an unknown person tries to get close. (If they haven't been instructed then they are worse than worthless.) Giving a stranger access to your room, your clothes, your weapons is a direct compromise of security. The call girl that comes from, say, Iran could easily put the agent to sleep and then replace the agent's ammo with blanks. Agents aren't likely to test the ammo while abroad. Then when the VIP shows up and gets attacked the agents have nothing to shoot back with - and the attack is successful.
A far likelier scenario is that agents requested the services. That means that the regime had corrupted the SS, just as it corrupts everything that it interacts with. The "don't you know who I am?" spiel becomes a universal solution to every problem. Laws don't just take the back seat, they are kicked out altogether. I'm sure the SS would have been able to suppress everything if only they were inside the USA.
It doesn’t matter if the girls were in the room. The guys would probably answer their door but not let them in. Doesn’t really matter though, all that matters is the charge.
I’ve known several secret service agents, egotistical pricks for the most part but they were squeaky clean. I can’t imagine this many guys were involved in something and it wasn’t a set up. One or two, then I’d believe it.