Communal fires have been used for ages and ages--to call community together, to heal in times of crisis, to share crops in times of hunger.
In Scotland, they call this the Tein-eigin, or The Need Fire.*
The fire called them together, the embers carried home--fire lighting fire, smoke cleansing and purifying and signaling.
Consider this your spark, your call to the center of town. Take what you need, pass it on, and carry it home.
*Thank you to Jenna Woginrich for your wisdom.