Re: side issue of green beer
> Weissbeer coloured green with Waldmeister (as served in Berlin)
That's not "Weissbeer", it's called "Berliner Weisse" and it is something quite different. Without anything added its taste is quite sour, the Waldmeister (sirup!) is really for the taste. Berliner Weisse also just has 2.5 percent alcohol so more of a refreshment than other types of beer.
I once ordered Berliner Weisse in Bavaria and got Weissbeer with sirup, NOT good!