I just could not find real reference that PvdS and Natalee had actually "MET".
Greta saying they were in the bar together is a bit vague, lots of people were in the bar at the same time, I am sure. Actually meeting, such as being introduced...in conversation, etc. would be more specific, and worrisome, I agree. But just being there at the same time does not raise real alarms in my mind. JMHO
After all, remember, it is also reported that Natalee met a man on the plane who she talked with throughout the flight. He was going to the same place. He has not been found, and there is no record of his return trip. That has also been posted. So, she met other men also, on that trip, it appears.
Well it raised suspicion in my mind, it is an important factor in my mind. PVDS had seen and possibly had contact with Natalee Sunday evening. Joran was there also in the bar area.
Sorry you missed that part of the Greta show.
You have your opinion and I have mine.
You know my thoughts and I know yours, now let's leave each other alone.