In the early ’90s, the influential Village Voice music critic Robert Christgau tossed one of his many classic barbs at Xscape: “En Vogue?” he wrote. “Mary J. Blige? Phooey — they’re not even TLC.” That said, Xscape was a Top 10 act in the vein of their more critically acclaimed R&B sisters, and if you have an itch for all things 1990s, this show will scratch it. Also appearing: Monica and Tamar Braxton. We’re just wondering how this crew can fill arenas in 2017.