I think it is only on the 7 night (unless they have added it recently). We just went last month for the one on the 7 night. They gave out goodies (visors, laynards, and luggage tags). They we each got a raffle ticket and they called out a number and if it was your number you had to answer a question about DVC (a CM came around and stood next to you and fed you the answer if you didn't know). Then you got to pick a prize (we got a DVC scrapbook.
They gave some news and updates about what is happening with DVC before starting the raffle/question session.
My DDs loved the visors and wore them throughout the cruise.
DJ