Hit up the Weinerei Cafe in Prenzlauer Berg, which on account of its irresistible charm and unique pricing methods has become quite an institution. You pay €2 as you enter and they give you a glass, which stays with you for the entire evening. With that glass you can get as much wine as you want, as many times as you want until the place closes for the day - they usually have around 15 varieties on a typical night, and though it may not be very high quality stuff being able to sample so many definitely makes for a delightful experience. Simple food items are available too - a salad, some breads and maybe pasta and/or a quiche. Upon your departure you're required to drop some money into an enormous glass jar, but the amount you leave is entirely up to you - so if you're feeling generous and/or enjoyed the evening you could leave something big, otherwise anything down to €1 is fine as well. Their website: http://www.weinerei.com/ Also check out this risotto place which is around a 10-minute walk from the Museuminsel, where the Pergamon as well as a couple other prominent museums are: www.ris-otto.de