A mathematician is a device for turning coffee into theorems -- Alfréd Rényi
All the universities whose staff lounges I've been to have had coffee machines with free coffee. I've seen groups name their meetings after coffee much more than other beverages (e.g. from Google, "AstroCoffee" exists in OSU, IfA Hawaii and Goethe University; a corresponding search for "AstroTea" turns up nothing). I've also witnessed one academic telling another "I'm stuck, don't know what to do next" and the other say, quite seriously, "have some coffee! If you're still stuck, have even more coffee!"
What is it about coffee that makes it so ubiquitous in academic culture?