Maybe you can make it two Germans but it's more likely that I'll leave Berlin on the 21st or 24th (depending on my current projects and clients) to spend a week or so with friends and off from work.
If the weather's still fine (the asphalt's close to coming to the boil these days), I suggest to visit the "Strandbar" behind Bode Museum (Museums Island), an open-air Kneipe with sunbeds and view over river Spree. Don't even think of asking for a glass for your beer (Berliner Pilsener among others) there.
Not far from Strandbar - Oranienburger Str., left hand side of the New Synagogue - is Café Orange. Their baked chicken breast with Mozarella, Parma ham and sage (EUR 8) goes nicely with a Jever Pilsener.
If you're already drunk: do NOT provoke the police men securing the Synagogue like my sister in law did last year. You will only have your bad breath while they have MP5s.
And don't forget to visit Prenzlauer Berg with the nice Kollwitz Platz, Kulturbrauerei and Kastanienallee. The fact alone that I live there should be reason enough. No need to light a candle, though ...