Thinking about this again. So you were thinking that she may have told her friends she was taking a cab back to the hotel, and Joran may have said, "I'll get us a cab" and signaled to his buddies the Kalpoes? Then she got in, thinking it was a cab, with Joran, and yelled happily out the window to her buds, and only in a couple of minutes did she notice they weren't going in the direction of her hotel.
And possibly she may by then have already taken a sip of Joran's beer or drink "You HAVE to try this!" which was not his at all but laced with roofies.