A certain and important formula for transforming an event into a particularly successful and happy one is for the couple to be present, on the dance floor, throughout the event, as the focal point. If anyone wants to take a picture with them, greet them or just say hello, they will approach them on the dance floor.
As soon as they leave the dance floor it is as if the event had just been downgraded. You want joy and happiness? Stay on the dance floor.