Vehicles available for reservation at nine locations throughout the district Washington, D.C., 2015-8-20— /EPR Retail News/ — Zipcar, the world’s leading car sharing network, today announced a new agreement with 7‑Eleven, Inc. to place a total of 18 Zipcars at nine 7‑Eleven® stores throughout the Washington, D.C. metropolitan area. These vehicles are now available for…