What are the technical specifications for conducting wi-fi in a public area?

Question

WiFi

Need to make free wi-fi for visitors in the mall.
There are a maximum of 6,000 visitors per hour in the shopping center, of course, they do not all crowd in one place, but are distributed throughout the territory.
I understand that routers should have coverage overlaps, so that there are no gaps in the territory. How to calculate the channel width for the entire shopping center, individual sections, session duration, etc., who has come across this? Where to read?

Answer 1

Actually, this is ordered from integrator offices) Design and survey work is being carried out and equipment is being installed.
Usually they take the intersection of the coverage area of ​​​​20% (by increasing the intersection, you will get fewer clients per point, which will increase the speed of the clients), a PoE switch and a point controller, a hotspot is configured. The switch and the controller can be made in one piece of iron.