Inside the Culture of Coffee-Obsessed Men

For almost four decades, Jeff Jungsten has been a secret weapon for architects and interior designers in the Bay Area: his namesake firm specializes in complex, six-figure-plus construction projects for the pickiest, and wealthiest, locals. The Mill Valley house was typical, a new ask from a longtime client who wanted Jungsten, in tandem with architect Drew McGukin, to turn the property into what he called “Functional Art.” That owner, a single, 50-something American with homes…