If I scan the wifi password in one of the hotels, can I use the wifi passwords in other rooms?

Of course. Every room has WiFi, but most passwords are the same, so you can face the network of other rooms.

There are two ways to build a roaming wireless network in a hotel scene. The first way is AC+AP, which has the advantages of unified configuration management, convenient operation and maintenance and more reasonable roaming mechanism. The second is that different APS or wireless routers all put the same name WIFI, which may be more suitable for low-cost hotels in hotels, cheap, and of course not the first advanced.