This is a small park directly across from the Smith Center, which is a solid spot for some reflection and rest, especially if you're living the busy Downtown lifestyle.
Symphony Park isn't so much a park but a large patch of grass with a few benches to sit on, string lights for nighttime hangouts. Come here during the mid to late afternoon and catch up on some of that sun before it disappears behind the mountains, then at night snap some great selfies in front of the rainbow art installation.
Party park, this is not, but some peaceful family or friend time? You've found it.