Very, very sleepy. Aside from that, a lot of jobs and money would be lost. A number of the poorer countries in the world depend on coffee as a key export to bring in money, so a world without coffee would mean less opportunity and jobs for the citizens of those countries. Additionally, coffee is one of the most traded commodities in the world, so the effect would be felt from the highest level all the way down through supply chains, producers, and eventually the consumer. In short, the world without coffee would not be good.