- hosts: localhost
  connection: local
  gather_facts: no
  vars:
    users:
    - foo
    - bar
    - bam
  tasks:
  - debug: msg="item.0={{ item[0] }} item.1={{ item[1] }}"
    with_nested:
    - users
    - [ 'clientdb', 'employeedb', 'providerdb' ]