I took a walk here on my own on a Friday evening at 9pm and it wasn't overly busy. I checked before I left the room to see when each show began but they were very regular so as I arrived one was finishing and it was a lovely evening to be out people watching while I waited for the next one 15 mins later. They've done a lovely job of choreographing the music with the fountains but there is definitely a romantic vibe in the air. Everyone seemed to enjoy themselves who was there and there were plenty of people around selling cold beers out of their little wheel around ice chests.
I think this is definitely a night time activity to get the full effect.