What’s new this summer is the roof, just set right down in the middle of a field. Seattle-born artist Heather Hart made it, with help from her family, and you can traipse all over its shingled slopes and drum the animal-skin wall inside the attic while the ferries go by and the mountains look pretty. On this night, there’s also a party. Food trucks start serving at 5:30 p.m. The band is Pollens, a six-piece under the influence of African trance and contemporary choral music. Don’t just stand there—dance. If you fall off the roof, the ground is soft. (Olympic Sculpture Park, 2901 Western Ave, seattleartmuseum.org/getout, 6–8 pm, free)