It's hard to describe how important it became to some people to get their free drinks, even if they didn't want them. It was a small victory over the drudgery of their working lives. It felt like stealing stationery. Or it just saved 20p.
And it affected all levels. I was in a meeting once, when we watched as the Chief Executive opened his door, ran to the coffee machine, pressed the button and when nothing happened, looked at his watch, slammed his hand against the machine, said “damn it” and stormed back into his office.