Offenbach Barcarolle is a beautiful melody. I'm very familiar with the melody, as is probably true for most people. Not sure where I heard it though. When I first heard you play this, I thought you were improvising the gorgeous introduction. But then I decided to listen on youtube this part of Offenbach's final opera, The Tales of Hoffmann. So I know now this is not the improvised spot and I learned where this melody comes from.
Very enjoyable to hear your performance! I'm sure all the people passing by enjoyed this as well.