Café Diem is the café of Vincent, on the main street of Eureka. It's the place where everybody meets to eat one of Vincent's extraordinary meals or have a cup of his signature "Vinspresso".
It is notable that Café Diem provides food free of charge to residents of Eureka and employees of Global Dynamics, acting as a sort of cafeteria or canteen for the entire town. When corporate fixer Eva Thorne, seeing this as something of a money-pit, eliminates the free-food policy, there is a strong backlash from the Eureka community at large and especially Vincent. As a response, Vincent begins charging Thorne $25 a cup for coffee, while still giving coffee to others free of charge (with Thorne's cost effectively defraying the cost of the free drinks).
Zoe Carter has a part-time job in the café. The freezer runs off of a fusion power generator, which is apparently safer than fission power generators.
- The name of the café, Café Diem, may be a play on words of the Latin phrase carpe diem, which means seize the day.
- The freezer seems to be bigger on the inside. In Eureka, you never know.
- The cafe runs on a fusion reactor. A goof on the part of the writers, in It's Not Easy Being Green, it is said the reactor runs on globidium, which isn't how that works.