Jazzercise is a Language (The Operating System, 2018) is a long poem that wants to be a smiling, skinny white woman. Here are the leg warmers, head bands, sweat, chants, and two-steps of the 1980's dance aerobics craze, but decked with the baggage of race, pixelation, rituals, violence, and body horror. The women in a hardwood studio inside your TV are so neon it's blinding. But the voice of Judi Sheppard Missett, the muse of Jazzercise is a Language, will carry them along.