# Using host groups in a playbook

**URL:** <https://forum.ansible.com/t/using-host-groups-in-a-playbook/18420>\
**Category:** Ansible Project\
**Created:** [June 6, 2015, 2:36am UTC](https://forum.ansible.com/t/using-host-groups-in-a-playbook/18420 "2015-06-06T02:36:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Istvan\_Szukacs](https://avatars.discourse-cdn.com/v4/letter/i/ea666f/32.png) [@Istvan\_Szukacs](https://forum.ansible.com/u/Istvan_Szukacs)\
**Post date:** [June 6, 2015, 2:36am UTC](https://forum.ansible.com/t/using-host-groups-in-a-playbook/18420/1 "2015-06-06T02:36:28Z")

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Hi everybody,

I was wondering what is the most idiomatic way of doing the following:

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**Author:** ![benno\_joy](https://avatars.discourse-cdn.com/v4/letter/b/73ab20/32.png) [@benno\_joy](https://forum.ansible.com/u/benno_joy)\
**Post date:** [June 6, 2015, 3:58am UTC](https://forum.ansible.com/t/using-host-groups-in-a-playbook/18420/2 "2015-06-06T03:58:30Z")

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try

{{ “:9999,”.join(groups[‘database’]) + ‘:9999’ }}