lass uns freunde bleiben (let's stay friends) used to have a companian bar named ruf mich nie wieder an (don't ever call me again), now it's all by itself. that's not a problem though, if you ask me, it's nice enough as it is. the small bar and café is located at choriner straße and zionskirchstraße, close to kastanienallee but away from the buzz. the corner building is unrefurbished, just the way i like it, i hate it when they glitz up these kinds of buildings with bright orange or green paint as they do sometimes.
in the mornings and during the day you could stop by for a coffee, freshly squeezed orange juice and a croissant or a piece of cake or perhaps a sandwich. at night, it tends to be busy, so expect not to find a seat and just mix with the crowd in the often packed bar. since germany has issued its smoking ban in restaurants, clubs and bars, some places have opened up separate rooms where you can still have a fag. this bar, too, has a 'smoker's lounge'. they used to have a pool table at the back as well, i'm not sure if that still exists, forgot to check the last time i was there.
there are some tables outside on the pavement, too, if you feel like having your coffee out in the sun (just pray for good weather).
find it on choriner str. 12, 10119 berlin (prenzlauer berg), open mon-thurs 8.00-1.00 h, fri 8.00-3.00h, sat 10.00-3.00 h, sun closed.