Until someone gets a kill, at least. Presumably neutral and/or town kills would also count. Though even if those exist, I suspect that rule might end up helping the wolves (especially towards the end, when there are less people).
As for the hangout thing, I asked Cazero about that and somewhat surprisingly actually got an answer, which was that it's a "safe assumption" that the kill isn't limited by hangout place (which is also supported by one of the investigation results being rather useless if we already know where the killer was).