map/json/groups.json

{
    "groups": [ 
        {
            "name": "Lobby A",
            "rooms": [0]
        },
        {
            "name": "Lobby B",
            "rooms": [1]
        },
        {
            "name": "Lobby C",
            "rooms": [2]
        },
        {
            "name": "Lobby D",
            "rooms": [3]
        },
        {
            "name": "Lobby E",
            "rooms": [4]
        },
    ]
}