ok well let's say tomorrow at 8 pm at mehringdamm station, is that possible? you'd have to take the u9 to berliner str. then change on to the u7 towards rudow to mehringdamm. there's a famous currywurst place there plus a street with lots of nice cafes and whatever. let me know if it works, and if you need it, my phone number is +49 176 8651 7547.