One time my army buds and I were in Hamburg.Germany at a small pub. We picked out the pub since it had moslty english speaking folks (brits).
There was 4 or 5 of us if I recall correctly. Anyway we were there about ten minutes when a mass of guys formed a wall and started looking pretty hostile. They walked towards us and started beating the shit out of all of us. We crawled and fought out of that place. Some on our hands and knees and some fist fighting. We took the flogging of beer glasses, bottles, fists, cigars, cigarrettes and feet. It was fucking scary. My friend Kneffler was the last one out. Just as he crawled out of that place some dude yelled "Hey you fucking Americans come back in! We'll buy you the next round. Nobody's put up such a good fight like that." By that time Diaz had already got us a taxi outta there. I replied "Fuck that!" and we got the fuck out of there.
Lesson is beware in Hamburg bars.