The always awesome WDWKOOK posted this a couple days ago.
All Disney Vacation Club members staying at a Walt Disney World resort -- on a reservation booked using either points or cash -- can access the Top of the World Lounge in Bay Lake Tower nightly through December 29, 2014. The perk extends to members and others in their traveling party. At least one member must accompany the group and provide a Key to the World card or blue Disney Vacation Club member ID card to gain entrance. Walt Disney World transportation must be used to reach Bay Lake Tower. Parking is only permitted to guests staying at Disney's Contemporary Resort or Bay Lake Tower. Lounge access is not available on select blockout dates which currently includes December 30-31, 2013, and July 3-4, 2014. Top of the World Lounge features a full bar, limited menu of appetizers and seating for approximately 77 guests. An outdoor deck is also available to view the nightly Magic Kingdom fireworks. Lounge access and seating are available on a first-come, first-served basis. Admission begins at approximately 5:00pm nightly.