I find this thread very interesting, because where I work, no one would ever, ever, try to speak to someone in the break room about work, unless it was really an emergency. The reason is that most of us are hourly. Because we are hourly and our company doesn't want to pay overtime, technically both the asker and the askee can get in trouble for discussing work while off the clock, because then we are working and technically could put in a claim for overtime pay.
Coming from this background, if I were new at a workplace, I wouldn't personally ask someone a work-related question in a break area (unless an emergency) because I would assume unless told otherwise that the person is "off the clock" while there-and unless I was specifically told otherwise, I would assume that even a person who works for salary is in the break room because they are on break and they don't want to talk about work.
So I find it strange that the new girl would even ask in the first place, unless her own supervisor said "Go talk to so and so about XYZ right now" and she thought she had to do it right then even if the person was in the break area. (Meaning, an emergency, even if just from her supervisor's point of view, and what can you do when it's your supervisor, especially when you are new?)
Obviously these are not the dynamics of the OP's workplace, or of the workplaces of many responders to this thread...but I'm wondering if that's not a concept that should get more play, that more people should be encouraged to operate in accordance with.