Saara Pritchard, an art adviser, was visiting a friend in Miami when a painting in the bedroom caught her eye. Bordered in silver leaf, it was a close-cropped, black-and-white image of John F. Kennedy ...

On a Saturday in April, Gotham’s newly opened Chelsea space was bursting with energy—it happened to be the day before the herbal celebrations of 4/20. A chrome sign outside read “Say HIGH,” welcoming ...