Dear [Name],
As you know, our previous meeting was a resounding success in the sense that it didn't actually accomplish anything. We're pleased to inform you that we're giving it another go.
Meeting Details:
Time: Still whenever we can fit it into our busy schedules
Location: The conference room with the wonky chair that's still on fire
Agenda:
We're really looking forward to seeing you there! If you get lost, just follow the smell of stale coffee and despair.