In the movie version of Harry Potter and the Prisoner of Azkaban, there is a scene where Professor McGonagall and Cornelius Fudge meet with Rosmerta, the bartender at The Three Broomsticks, to talk about Sirius Black. Scene 80 - 82
This brought up a few questions:
Why was Rosmerta privy to this conversation? It seems telling a bartender information they are trying to keep from Harry is a very poor decision (regardless of if he's hiding in the room).
Was she the only one at the meeting that did not know about what Sirius had done and his relation to Harry? Why would they need to meet with her to tell her?
Was this a deliberate meeting or a chance encounter? My initial thought was that it was a deliberate meeting; but after putting together this question, I think it may have been intended to be a chance encounter and I interpreted it incorrectly.
Finally, How did this specific scene play out in the book? I recall that Harry had to sneak into The Three Broomsticks, but were the circumstances the same (i.e. same people, same reason for discussing Sirius)?