This is a great option if you're looking for dinner and drinks in the hutongs, especially if you have meat eaters and vegetarians in the mix. I love Korean food but have trouble finding vegetarian Korean food. Here they have a good number of vegetarian and vegan options, marked with a leaf on their menu.
My partner and I ate at the Ju'er Hutong location. We sat in the courtyard and really liked the atmosphere. The waitress was attentive and the drink menu had a lot of fun options. We ordered the set meal (his with meat, mine without) and each got a pomegranate soju cocktail, and our bill was around 220 RMB, which is not bad for dinner and drinks for two people. The set meal was 59 RMB on its own, including cinnamon iced tea. We agreed we both really liked our meals, although we're eager to go back and try other dishes, as bibimbap is a good but pretty standard dish.
The restaurant has an English menu, and also a very detailed website in English if you'd like to see the menu before you go.