What makes you think TheIdeasMan was joking? All I drink is water and I'm 31 years old. Drinks are determined by the person not the hobby or profession. Only time I drink code coke or slushes is at meals (coke) or when I'm out and stop at a gas station that sales them (slushes). Otherwise ice water and tea. I only drank coffee when I used to work 12 shifts at a factory.
I drink coffee because I like the flavour not because it has any effect on my programming. While at work I probable drink equal quantities of water and coffee.
What your hobbys are have really nothing to do with what you drink. Drink what you like to drink there isn't a certain type of drink that all programmers or all gamers drink.