Tap dance has long been understood as an American form, but which America? Leonardo Sandoval counts both the African grooves and moves that chugged up the Mississippi from antebellum New Orleans and those that took root and flowered in his native Brazil. The New York-based dancer-choreographer has called the current hour-long show a “fever dream of Carnival,” which, unleashed onto Rio’s streets at Easter, is already fever and dream. With five musicians and eight all-star dancers meeting “in the blur between band and dance company,” I Didn’t Come to Stay promises the kind of uncanny doubling that folk tales are made of. Two brothers separated at birth—as America from América—finally reunite. Along with a few in his own crew, Sandoval got his New York start with Michelle Dorrance. Tap aficionados will recognize her rhythmic intricacies, deft shifts from group to solo, and the high caliber of those soloists. Sandoval adds a silkiness, an easy grace, and cadenzas you hope will go on shimmering forever. —Apollinaire Scherr