CHAPTER 4 Mob Rules

Lillian So is in a San Francisco nightclub, sweating. It’s 8 a.m.

It’s not the end of a long night, but likely the beginning of a long day for So, a fitness entrepreneur of the most intense nature, whose approach involves mixing a whole lot of types of workouts together and presenting them in new and different places. She has a series of workouts in San Francisco, all tied to her conveniently pithy and descriptive last name—SoFree, SoFierce, and SoDefined.

For a version of SoFierce—where the music is advertised as: “Mostly hip-hop, trap, bass, booty bass, club bangers, juke, dub, dope [stuff]. NO pop music unless it’s remixed beyond recognition”—she’s working very much in the spirit of the locale. Behind her, banquettes ...

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