This place is reasonably elegant and certainly no dive, yet you can order up half a Peking duck (半只烤鸭; bànzhī kǎoyā) here for a paltry ¥39, including scallions, cucumbers and pancakes. That's a meal for one sorted. With a large chilled beer thrown in for another ¥8, it's a steal and only slightly more than what you'd pay for fast food.
There are loads of other dishes on the photo menu on the wall, but it's the duck that's the main draw. Appropriately enough, it's located on Beijing Donglu.