Coffee or Beer

So when I was a young undergraduate and hung around lots of physics and math people, I drank lots of beer. I was even encouraged by my departments to drink beer. To the point where I shared my homebrew with a one and went out drinking with another. In fact when I was in charge of the department banquet, I wanted to hold it in one of those science museums for kids but was told by at least four professors that they would boycott a dry banquet on principle.

Now I hang out with largely computer science people. They drink coffee. Pretty well end of story, go to the bar with a group of cs grads and it's like taking a fish out of water. Even I as I go through the day find myself desiring a good cup of coffee.

What is the deal here. One group wants a drug that helps them pontificate and the other wants the drug that helps them work. Why am I now in the second group? My undergraduate professors did not warn me about this. Although there is hope. The group of us computational math guys like both, well we also like tea. And apparently some of my colleagues like tea way too much, spare yourself an hour and never ask them what kind they like best.