Most workplaces have free coffee, but few have anything else to drink. I suspect if you looked at workplaces which stock a variety of free beverages, coffee consumption there would be much lower as well. I'm somewhat ambivalent about coffee; I'll drink it if someone else prepares it, but I almost never bother brewing a pot myself. Without an office where someone's always got a pot going, or where they have one of those horrible mini-cup instant brewers, I never drink it.