I don't want to burst anyone's bubble but...
If a player can sit in a station bar (presumably with other players), and watch PC ships land/depart, then they'll need to be in the same instance as those ships, which limits the number of ships that could be in the same instance as other ships.
I think FD are more likely to keep the two elements separate for this reason.
That doesn't mean you couldn't sit in a bar and watch NPC ships going about their business, just not sitting in a bar and expecting to see your friend's ship arrive/depart.
Of course, I could be wrong...