Quark
Der Beste
Every supermarket of a reasonable size has tons of sorts of beers. Just buy some to try them out.
You should try at least one Pils, one Weizen (or Weißbier), one Dunkles like Alt or Flensburger Dunkel...
Yeah, Faxe or Heineken is always good.
A very very good lager beer is the (Czech!!) Budweiser (Budvar).
Heineken is horses' pee (and besides that; Dutch)
Faxe = Danish (and you can buy them also in ONE liter cans!
You can also buy some 5liter drafts (fûts?) with a small tab on them.
@Rudi, kann man die auch allen in Dosen bekommen? Ich meine, Glas kann man (sicher als Fussgänger) nicht rein nehmen. Darauf wird kontrolliert! Vor allem bei den Fussgängern!