Lee Broom’s fantastical swing chair blurs the line between art installation and fine furnishing. Repeating the circular motif so often seen in his work, a pair of steel hoops—in matte black or brass—connect to create a luxe, fanciful statement piece could only have sprung from the starry London designer’s imagination. No wonder Beyonce incorporated it in her feature-length music album “Black is King.” Seat and backrest upholstered in Kvadrat wool.