If you have a library card, you can check out afamily pass at Georgia’s public libraries (they’re available at participating branches in all 159 counties) & get free admission to Zoo Atlanta for a family of four . There’s one pass per location. The pass, which is valid Monday-Friday only, may be checked out once per year, per card, per household, and it is valid for up to four guests. Essentially, you check out the Zoo Atlanta Family Pass DVD at the front desk of your local library, and when you return the DVD to your library, you will receive a receipt, which is required for Zoo admission. The pass is valid for 28 days from the date of the receipt showing the return of the DVD.