Amoako Boafo is in a buoyant mood. The 40-year-old Ghanian painter is about to open his first London show, “I Do Not Come to You by Chance,” at a UK outpost of the American mega-gallery, Gagosian.

EXPO Chicago is back at Navy Pier from April 24–27 for its 12th edition—the second under Frieze—with more than 170 galleries ...