For example, in a tea shop, there will be a hotline at the door. Just call and ask. If it's not written on the door, you can buy a cup of milk tea and ask the owner how they joined. If your address doesn't conflict with theirs, they will definitely tell you.
However, although our family has opened several stores, they are not chain stores, but the boss is in charge himself. The opening of new stores is basically crowdfunding. If you think the joining cost is too high and you have some spare money to invest, I think crowdfunding is a good choice. Because crowdfunding companies also have their own risk control departments and want to profit from them, they will first be optimistic about whether this store will be profitable and help you avoid some risks.
For example, Koolga Coffee, which is very popular now, also has its own development department to join. The Commissioner of the development department will also put his own business card in each store, so that anyone who wants to join can join. Some restaurants also have joining hotlines on their menus.
A relative of mine used to cook and serve western food, which was very crowded every day. A friend of mine wanted to join and asked my relatives. They politely refused because they didn't want to develop into a joining model.
The same is true of other industries. Like the steaming houses popular in enron nano, their shopkeepers will get a referral fee and let others join. So if you go to the store and ask the boss, the boss will still receive you warmly. I believe that other service industries are the same, after all, brand chains can be bigger.