Visit any Hackerspace anywhere in the world, and you'll likely find a crate of two of Club Mate there. It's a de-facto official drink of Hackerspaces worldwide. At ours (Kraków, Poland) we go through a crate or two a week.
Same here in Austria. At metalab.at (hackerspace in Vienna) we need about 10 crates per week, and god forbid we run dry...
I think club mate, hacked hackers...
Go to any co-working space in Berlin and you'll see.