I would say it would be better to test this at a park or on a street, everyone at a train station is usually in a hurry so it kinda cancels out paying attention.
This does remind me though of something that happened when I was a teenager. I was in the mall with my friends (of course!) and these four huge black marines walked through the mall singing the most beautiful harmony to a Boys 2 Men song. It was amazing. What seemed like the entire mall stopped and listened to them and applauded when they were finished. They weren't soliciting money or anything just singing. I'll never forget that.