In the United States, on the other hand, you usually buy a coffee at Starbucks or Dunkin Donuts or a similar fast food chain, and bring it with you as you head to work. It's commonplace to see people hauling around extra large iced coffees at work.
Caffeine is the perfect drug for the workplace: it keeps workers stimulated to keep them productive. I wonder to what extent French vs. American coffee customs correlate to their attitudes on work. American culture is driven by the constant need to be productive, at any time, in any context. Even young children are brought to "play with a purpose" as they're subordinated and molded into this culture (just look at how children are started on technology from earlier and earlier ages in hopes that they'll "grow with the tech" as an example). We caffeine addicts drink with a purpose.