You can grab a coffee or a juice right next door to the KINDL Center in the old brewing Hall at König Otto, complete with all the fascinating brewing equipment from its completion in 1930 it is a hall reminiscent of German Expressionism style… or as stated on their website. :)
One of my favorite sophisticated-but-casual places in Berlin. Everything is delicious and the restaurant is cozy and minimal at the same time. It is the right place to have a wonderful dinner with somebody special without being too anxious about the dress code :)
This cinema is nothing special if you're looking for that comercial combo big screens + major sound system, but it has its own sidewalk charm and decadent glam. Also it makes a good option for a date. You have plenty to choose for dinner and drinks all around Kottbusser Tor.
There's nothing more revigorating during the dark winter days than spending a couple of hours in a sauna. Germans have mastered the art of sauna and you can find amazing pieces of architecture in the public swimming pools (Stadtbad). I find Stadtbad Neukölln very peculiar in its neoclassic architecture and it's definitely a wallet-friendly option to enjoy some sauna time there. Be prepared to be naked in front of man and woman!