With the multiplayer plugin you could open multiple instances/games and assigne them to a different room.
And then modify the client to display that there are 10 rooms avaialble (In case you have 10 instances of the game running on a server),
and if the player chooses room 1 you join the first room, room 2 chooses room 2, etc.
But for that you need on the host (server) side, to have assigned each instance to a seperate room and to decrease the load of the gpu, make everything invisible (The whole layout), even tho it's invisible, the positions are still being calculated and synced with each peer.
On the client site you can request the amount of peers in each room to display it besides the name of the room, if you have a player cap per room.