Beauty is a kind of power. Lee Hyun-soo can't sell a single session, yet she witnesses firsthand how the top performer does it. Jason presses close, his hand slipping into her yoga pants. The female member gasps, eyes wet, and doesn't push him away. That night, the same pants turn up on a motel bed. "One last stretch." Going in, she bites her lip; coming out, she's still hanging on his neck. Yi-chen lifts her shirt and presses her side: How about I start working out too? He says yes. This gym isn't selling sessions—it's selling bodies.