If you wish to create your Huddle room without plan, click Add Workspaces.
You can choose now huddle:
Once the Huddle is created, click on it
A Huddle Room need a connected huddle sensor, you can add the sensor under devices, further information are here
If you want to add some zones or tags to the room, please see here.
If you would like to change the option set, you find more information under the following page