For Schultz, this mainstream customer base was both a boon and a curse. In Pour Your Heart Into It, his 1997 account of Starbucks’ rise to global behemoth, he reveals a preoccupation with authenticity that echoed Kurt Cobain’s. In 1989, he initially balked at providing non-fat milk for customers—it wasn’t how the Italians did it. When word trickled up to him that rival stores in Santa Monica were doing big business in the summer months selling blended iced coffee drinks, he initially dismissed the idea as something that “sounded more like a fast-food shake than something a true coffee lover would enjoy.”

Eventually, Schultz relented. And really, what greater punk-rock middle finger is there to purist prescriptions about what constitutes a true coffee drink than a blended ice beverage flavored with Pumpkin Spice powder? . . .

In reality, the chain’s customers have played a substantial role in determining the Starbucks experience. They asked for non-fat milk, and they got it. They asked for Frappuccino, and they got it. What they haven’t been so interested in is Starbucks’ efforts to carry on the European coffeehouse tradition of creative interaction and spirited public discourse.

Over the years, Starbucks has tried various ways to foster an intellectual environment. In 1996 it tried selling a paper version of Slate and failed. In 1999 it introduced its own magazine, Joe. “Life is interesting. Discuss,” its tagline encouraged, but whatever discussions Joe prompted could sustain only three issues. In 2000 Starbucks opened Circadia, an upscale venue in San Francisco that Fortune described as an attempt to “resurrect the feel of the 1960s coffee shops of Greenwich Village.” The poetry readings didn’t work because customers weren’t sure if they were allowed to chat during the proceedings. The majority of Starbucks patrons, it seems, are happy to leave the European coffeehouse tradition to other retailers.