Nice question! I would probably:
* motivate a friend to join me
* get some food (enough for my friend, me + others )
* On Friday, we would go to a local public place (e.g. marketplace, park...) and have lunch/picnic.
* Some sign would say "This is 'Friday Lunch for local people' - come join us!?' "
Idea is: even if noone joins us, we still have a good time; it's no effort wasted.
And maybe next time someone will join?! Or we somehow inspire people?