Best German Beer Joke

When looking up information on the best beer in Germany (what can I say I work for the Goverment) I came across this joke..

After work, all the brew masters from the Munich breweries sit together in a pub. Needless to say, each brewer orders beer from his own brand, i.e. the Löwenbräu guy orders Löwenbräu, the Hacker-Pschorr guy orders Hacker-Pschorr, and so on. Last one to go is the Augustiner guy. He orders a Coke. Everybody is stunned, asking - "why?" - "Well", he finally says with a wide grin, "if you are not ordering a beer, then I won't, too."