ADULT NERDFIGHTERS
https://www.facebook.com/groups/197523853706484/

NERDFIGHTERIA
https://www.facebook.com/groups/FrenchTheLlama/

NERDFIGHTERS!
https://www.facebook.com/groups/6711213213/

Nerdfighteria has created many Facebook groups according to nationality. You can visit them all at http://effyeahnerdfighters.com/localnfgroups or https://nerdfighteria.info/groups/browse/1284