Every Wednesday Lance Armstrong will be leading a group ride called WEDU Wednesday. You will get the chance to ride alongside Lance Armstrong, and unlock the WEDU Wednesday kit. To sign up for the events, head over to this link: https://zwifthacks.com/app/events/?key=618430575b27c.
I have not participated in this event, but the pace is around 2-3wpk and it is an hour long. In the past two events there have been over 1500 riders participating in the event.