There is usually a DVC "member celebration" the first day around 2:30. Other days there might be a DVC presentation, which is more aimed at new members.
If you don't have a magnet on your stateroom door, let the DVC desk know. They try to identify all DVC on board (even if not using points - I have never sailed on points) and often you will find some nice gifts in your cabin. There are also nice prizes at the events. I got a nice cherry wood box and a music box from DVC on cruises.