Keeping it simple in the Rhineland

In three weeks time I'll be in the Rhineland visitng Düsseldorf and Cologne.

One of the things the brewpubs in the Altstadt of both cities get right is the simple service system.  You sit down - or if you're in a hurry lean against a standing table outside - and then wait for one of the blue-aproned waiters (Köbes) to pass with a tray of small glasses of Alt or Kölsch.  A glass is put in front of you, a pencil mark made on your beermat and when you've finished you pay the waiter.  No queuing at the bar, no ordering and no need to decide what to drink given there's just one beer, served by gravity from a seemingly endless supply of wooden barrels.  And some pretty tasty meat-based snacks to go with it.

It makes me wonder whether it would work here.  On the face of it, there seems to be no reason why not but somehow I don't think it would.