My favorite work of the first program (“Lucinda Childs, A Portrait 1963-2016”) of a two-part Lucinda Childs retrospective now on at the Joyce Theater was Radial Courses (1976), a hugely fun, tongue-in-cheek, pretzel-puzzle of a dance. Promenading at a clipped pace, four tidily attired male dancers circumscribe a large oval shape. As the British love ...