From the website:
Whenever you are staying on your Membership at Bay Lake Tower at Disney's Contemporary Resort, Disney's Animal Kingdom Villas, Disney's Beach Club Villas, Disney's BoardWalk Villas, Disney's Old Key West Resort, Disney's Saratoga Springs Resort & Spa, Disney's Vero Beach Resort, or The Villas at Disney's Wilderness Lodge, you and any Guests staying with you, are permitted to use most of the other Disney Vacation Club and Walt Disney World Resort hotel pools (in addition to the pool at the resort hotel at which you are staying) if they are not at capacity
Be sure to check black out dates and the "no pool hopping allowed pools." You can't hop to SAB or any of the BC/YC/BCV pools if you're not staying at BCV. You can't hop to BLT, Contemporary or the pools at either Kidani or Jambo unless you're at the respective resorts.