I don't drink coffee, and to some degree this has impeded my astronomy career. Coffee is the one social connection even the most isolated theorist engages in. Heck, our wall of 3x3 monitors showing the newest data from our satellites is intentionally built into the coffee room. It is there to spark discussion among the coffee clique.
Don't drink coffee? Fake it with tea. You need a pretense to see your fellow scientists, else you'll be out of the loop.
LIfe as a Daytime Astronomer: Coffee