Shops in hamlets.

[Picoman]

Along with Hamlet Defence.

A Chocobo Carriage ride between Hamlets and a third point.
Guild Marks for Materials exchange at the Hamlet Guild.
Conquest type system through the Defence for availability of NPC Shops.
Master Guild buff.
Mail Box and Retainer Bell.
Daily Guild Tasks in relation with the surrounding area.

I believe these places have the potential to attract a population. I would love to spend time within The Owls Nest in Coerthas.