Question: When did the seventh Disney Vacation Club resort, where the chalet-style building that was designed for small and medium-sized business meetings was formerly situated, open?

Context paragraphs:
Disney's Saratoga Springs Resort &amp; Spa: Disney's Saratoga Springs Resort & Spa is a Disney Vacation Club resort at the Walt Disney World Resort.  The resort is the seventh Disney Vacation Club resort and is situated on the former site of the Disney Institute.  It first opened May 17, 2004 and was built in three phases.  It is now the largest Disney Vacation Club resort.  The resort was inspired by the city of Saratoga Springs, New York.

Disney Riviera Resort: Disney Riviera Resort is a proposed Disney Vacation Club Resort in Walt Disney World, to be built by Walt Disney Parks & Resorts between Epcot and Disney's Hollywood Studios.  It will be the first newly-constructed resort on the new Disney Skyliner gondola system.  It is expected to open in fall of 2019.

Disney's Hilton Head Island Resort: Disney's Hilton Head Island Resort is a Disney Vacation Club Resort and vacation rental accommodation, part of the Disney brand of timeshares, located in Hilton Head Island, South Carolina.  Designed by Cooper, Robertson & Partners, it opened on March 1, 1996.  This property is on a secluded 15 acre island in the Shelter Cove Harbour area of Hilton Head Island.

Disney's Vero Beach Resort: Disney's Vero Beach Resort is a Disney Vacation Club resort located in Vero Beach, Florida.  The resort was the first Disney Vacation Club resort to be constructed outside the Walt Disney World Resort area in Lake Buena Vista, Florida.

Disney Vacation Club: The Disney Vacation Club (DVC) is a vacation timeshare program owned and operated by Disney Vacation Development, Inc., a subsidiary of Walt Disney Parks and Resorts, a unit of The Walt Disney Company.  It allows buying real estate interest in a DVC resort.  Disney Vacation Club's Senior Vice President is Ken Potrock.

Disney's Old Key West Resort: Disney's Old Key West Resort is a Disney Vacation Club resort at the Walt Disney World Resort.  It opened on December 20, 1991 and was formerly known as Disney's Vacation Club Resort until January 1996 when it was renamed.  It was the first Disney Vacation Club Timeshare Resort, and has the largest rooms of any of the fifteen Disney Vacation Club Resorts.  The accommodations include kitchen facilities and a laundry room.  The rooms are designed in a Key West theme.  Rooms are also available year-round for rental by non-members (and members) as Disney Vacation Club retains ownership of a majority of the resort.

Aulani: Aulani, a Disney Resort & Spa is a beachside hotel, resort and vacation destination offering complimentary children's activities and programs at the Ko Olina Resort & Marina in Kapolei on the Hawaiian island of Oahu.  Part of the Disney Vacation Club, it is the third Disney Vacation Club Resort located outside of a Disney theme park property.  The resort opened on August 29, 2011.

Walt Disney World Conference Center: The Walt Disney World Conference Center was a chalet-style building that was designed for small and medium-sized business meetings.  It opened in August 1980 along the banks of Club Lake and was then converted into part of the Disney Institute.  It was later demolished when construction began on the Disney's Saratoga Springs Resort & Spa, which now stands on the grounds of the former Institute.

Marriott's Grande Vista: Marriott's Grande Vista is a Marriott Vacation Club resort, located off of International Drive in Orlando, Florida.  The timeshare resort is the largest within the Marriott Vacation Club portfolio and has 1616 guest studios, one, two and three-bedroom villas, located in 24 mission-style buildings.

Bay Lake Tower: Bay Lake Tower at Disney's Contemporary Resort, commonly known as Bay Lake Tower, is a Disney Vacation Club resort located at the Walt Disney World Resort, opened in 2009.  It is located in the Magic Kingdom Resort Area, adjacent to Disney's Contemporary Resort, Bay Lake, and Magic Kingdom.

Supporting paragraphs: Walt Disney World Conference Center Disney's Saratoga Springs Resort &amp; Spa
Answer: May 17, 2004