You might be able to use Group Policies and RADIUS to solve this issue. On your RADIUS server, you would create a user and password for each room. These would be the credentials that guests will sign into a particular Room. Configure your RADIUS server to pass a room name along as a parameter In Meraki, create a Group Policy for each room, naming the group policy the same name that the RADIUS server will send. Assign the VLAN ID in the group policy. Setup the WiFi SSID for guests to use your RADIUS authentication and layer 3 roaming. In each room, have the Chromecast use the room credentials for the WiFi. Guests get the room credentials so too they can sign into the WiFi. In this senerio, guests sign into the WiFi from any access points, can roam between any access points and be tied to a particular policy and VLAN and Chromecast.
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