1. Food Street and Food Market: In some food streets or food markets in Beijing, there will be many stalls from different time-honored snack bars, where you can try all kinds of classic snacks at once. For example, there are many time-honored snack bars in Wangfujing Snack Street, Guijie Street and Houhai Bar Street.

2. Century-old shops gathering area: There are some areas in Beijing where time-honored snack bars gather, where you can taste many time-honored snacks at one time. For example, there are many century-old shops in the hutong near Shichahai, including Niuhuaju in Guijie Street and noodles with dregs and sauce in Zhang Yiyuan. There are also many century-old shops near Wangfujing, such as Quanjude Roast Duck and Donglaishun.

3. Hotel or food court: Some large hotels or food courts will also invite a number of time-honored snack bars for customers to taste at one time. For example, in some five-star hotels, snack towns or snack streets will be set up, and many old-fashioned snack bars will be gathered so that people can taste all kinds of snacks conveniently.

It should be noted that even in the places mentioned above, there is no guarantee that all the time-honored snacks will be found, because some time-honored snack bars may not necessarily appear in these gathering areas. Therefore, if you especially want to try an old-fashioned snack, you'd better check its specific address in advance and go to the place where the shop is located for dinner.