At our last WvW Discussion meeting we came to the conclusion that these once a week events did not yield enough right now, and restricting when to teach might not be the best of ideas.
We are however encouraging everyone to always bring in new people to the parties they are running and teach them the ropes.
This way it opens up to anyone to help out without taking too big of a commitment.
On my part, I might take this up again, but now this Monday seemed very busy yet again, so I might need to reschedule when.