What did the person do every day?

Now, I want to tell you a story about a person who always went to the same beerhouse at the same time every day and asked for two glasses of beer. He drank them and then asked for two more. One day the waiter in the beerhouse said to him "Why do you always ask for two glasses of beer? Why not get one big glass instead?" The person answered, "Because I don’t like to drink alone. I drink with my friend. "But a few days later the person came in and asked only for one glass of beer. "Oh, "said the waiter, "bas your friend died?" "Oh, no, "said the person. "He is very well. This glass of beer is for him. But I have stopped drinking beer. My doctor does not want me to drink any more because it is dangerous for me."