Gorgeous blooms and beautiful music are often found occupying the same territory, but has there ever been as inspired, all-encompassing and downright joyful a juxtaposition as the San Francisco Botanical Garden’s annual Flower Piano extravaganza? Back in 2021 after a pandemic-enforced temporary halt to its five-year run, this ingenious collaboration between the Garden and the partnership duo Sunset Piano plunks down tuned pianos in 12 locations throughout the site’s 55 acres in Golden Gate Park and invites both amateurs wandering through and scheduled professionals to plop themselves down on the benches and play at will.