Pick a week, share the link, and everyone marks when they can play.
Optional.
Pick any day in the week you want to play.
The event's reference timezone. Everyone still sees times in their own.
You can switch from 1 hour to 30 minutes later, but not back.
Optional, in the event's timezone. After it, availability is frozen so you can decide.
A time only counts when at least that many people are free. Leave the maximum empty for no limit.
When the event is full, new people queue in join order.
People vote games up or down. Turns itself off when there is only one game.
No accounts: anyone with the invite link can join. Events are deleted 3 months after their week ends.