I can’t go and would love for someone to use the tickets. The event is really cool and laid-back, you can browse the gardens while several live acoustic performances take places in various spots around the gardens. You don’t have to be there right at 5:30, that’s just when the music starts. You can bring your own beverages (including alcohol) and food or buy some at the cafes. You can also bring chairs and blankets since there is no seating other than occasional benches. More info.