[gringochileno]

I'd still go elderly. She's a nurse so ask her something that it would be reasonable to think she might be able to help you with, like where's the cafeteria etc. If she's interested but busy she can quickly ask her personal question and then you can get down to business (I probably wouldn't run the full GALNUC though, maybe just NUC). It's very possible that she'll be too busy to engage you and excuse herself from the conversation--realize that you're not going to win them all.