please be aware that today starts the train strike throughout germany and berlin. Double check how you will arrive to zinefest, because the S-bahn, U-bahn and DB trains might not be available as they normally are! Organize your travel plans via http://www.bvg.de
UPDATE: it seems like the U-bahn is not affected by the strike, because it is a different company. So you can still arrive to zinefest by taking U6-Mehringdamm, though it may be very full in the trains. More info on what trains are running can be found here.