Thank you so much for posting the info, KeyboardGuy90. I never would have heard about this otherwise. I managed to get the day off from work so I can go
Union Station is a pretty big place, with a number of different floors, including one for the train and subway platforms, one for shopping, and a whole floor just for a giant eatery. It's a historic/tourist site as well as a train station. My guess is she'll be playing in the lobby area (well away and upstairs from the actual train platforms.) I have my fingers crossed that I can get some good pictures and a decent recording.