What is the appropriate table spacing in the restaurant?

Keep a distance of 80cm to 120cm. It is often seen that some fast food restaurant owners put two tables and chairs next to each other in order to save space, that is, customers eat and bring the tables back to back. In fact, although this makes full use of the space, it gives people a very annoying feeling, especially in street shops without air conditioning on hot days. When you see that customers seem to be crowded with buses, are you still willing to go in and spend money? Even if there are one or two vacancies, I don't think you want to have dinner with a stranger. So I suggest that if you decorate a fast food restaurant in a small shop, the distance between your two tables should be kept at 80cm to 120cm, so that even if the two tables are full of people, you will feel a space in the middle and feel much cooler psychologically.