Let’s be clear.
It is going to rain on the 19th. Summer has been crap so far. You can of course hide in a pub as usual or you go and do something with your brain. Fill your mind with wisdom and inspiration on the 22nd long night of museums. One ticket gets you into all museums in Berlin till long past midnight. One ticket is as much as the cover charge for Berghain. BUT you will actually get in! There is no grumpy Sven to turn you away. Instead friendly faces will show you the wonders of technology, future science, history, art, biology, you name it!
Berlin has more museums than Venice has bridges. Ok I made that up, but it’s probably true.
go there – learn something
and yes, there will be food too