whenever you want, I prefer everyone to create one when he'd like to play, and hopefully people will show up.
I created one for Sunday 7PM CET, and I'm planning on to create them for every sunday evening, as it fits for me the best. But that doesn't mean I won't create other games occasionally as well, probably 24 hours earlier (to make a proper scheduling).
If people get used to certain times/days I hope it will be a self-sustaining tradition. Also bet sizes, therfore quality, can also be raised with games like this. As today's was a 707

pot size game, which is generally not easy to put together in 30 minutes. Now, it was up and running for the first attempt.