“Last week, Laura, a 22-year-old from Kansas City, proclaimed, ‘Honestly? Isaw this and I was like, “Oh, they are: This is my calling?” ’For her part, Lil wants the girls to become who they are: ‘Whether it’s singing or standing on a bar, just be real and be yourself.’ Miraculously, despite the endless line of switching hipbones here, the show is not piggish and even successfully manages some family-values patter. Its gravity is meant to draw us all of us into its orbit.”