Risa Chicken
Risa is one of the granddaddies of all-day and late-night Berlin street food - enjoyed both in the cold light of day as well as the blurry haze of Sonnenallee, the later the better. Known best for their charcoal roasted whole chickens, the restaurant also offers solid fried chicken, potato wedges, and corn on the cob in a cafeteria-esque environment. Take out is the move here - you'll be the most popular kid on the bus, for sure.
The new location further South on Sonnenallee has the charcoal grill now - if you're going for the chicken, go there.