I work in a federal facility, which means free coffee is expressly illegal. Sucks. Something about not overpaying federal workers with extravagant perks.
So we each take turns buying coffee, or pitch in change if you don't. Despite this ever present supply, the Starbucks two blocks from the office is on a first name basis with like half of my co-workers. It's primarily a social thing, not a caffeine thing, and I have definitely suffered by not joining them.