I want to be able to make a short living, public camp fire. So everyone can get warm when there's too little firewood for every home.
Make it safe during winter, early spring and late fall, and maybe not so much during the hotter and dryer seasons.
And if we throw in some lumber as well, we could build a bonfire. Lasts longer, warms a hell of a lot more, but not very safe, no matter when you do it.
The camp fire could also be used for cooking while away from home.