You should look into P2P lobby servers something like how Yacy works
https://github.com/yacy/yacy_search_server
https://yacy.net/
this gives Unlimited Lobby servers [with some P2P swarm blockchain backup > these will always be around]
this also gives lobbys more than 10min of idle time [Hours ~ Days ~Years if they have to be]
Also Integrate & Work with Discord for Voice coms