Are there any other places like 798?
You can consider Houhai’s “Jiumen Snacks”, which are traditional Beijing snacks.
If you go to Guijie Street, it is recommended to go to time-honored brands such as "Kong Liang" and "Dong Xing Lou".
Wangfujing Snack Street and Qianmen are not recommended. They are both expensive and deceptive to outsiders.
Nanluogu Alley is now full of newly opened small restaurants and bars, and there are no special snacks. The only thing worth trying is the "Wenyu Cheese" double-skinned milk in the middle of the alley. It is great, but you must arrive before 7 pm.
Otherwise it will be sold out.
In fact, you can try Gulou East Street. Some small shops serve good snacks, such as the best fried liver "Yaoji Fried Liver" (just east of Gulou). You can also try a big bowl of mutton soup.