Did you know that Japanese literally love the Beer Garden concept and imported it in mass from Germany?
From June to September, so many restaurants and most hotels offer a 2-hour package with all you drink ! they have partnership with the famous brands and depending on the location, offer random junk food for up to elegant dinners. I tried a number of them and it is fun. This is where you see families, salary men, relaxed and friendly people in numbers.
I enjoy one in Tokyo Bay, very classy with a Thai food theme in August, the place was full of families and we enjoyed a nice evening although not quite comparable to what you would find in Frankfurt or Munich!