E-scooter workers in San Francisco at the Ford-owned start-up Spin joined a union on Wednesday—a first in the fledgling industry. Roughly 40 Spin workers—who collect, repair, deploy, and charge Spin’s fleet of more than 500 electric scooters on the streets of San Francisco—are now part of Teamsters Local 665, as first reported by the San Francisco Examiner. The union says workers want to negotiate for better pay, health care, and retirement security in their first contract.