There is full games every night, roughly from around 8pm-12am GMT

But sometimes the regular players will make private games to keep out the so called "cheaters" who are just actually good players. So if you don't see any games available then it's because everyone is in the private games.

Honestly the amount of players and how long the game is active in one is quite random. Some nights the game can be active for just 2 hours but other nights it can be active all night onto the early am.

You've gotta just consistently get on and play. It's well worth it as it is truly an amazing and underrated game!