Just somewhere people will gather instead of just staying in the city or the popular leve camps, like in XI everyone gathered in Jeuno then Whitegate then later Port Jeuno for Abyssea and early in life, people gathered at Selbina or the Outpost in dunes for partying. Since they're related to quests it's likely the quest hangout.

Also, he didn't discard anything -- he clearly said he won't implement something till he has a use for them, i.e why build a cake when you have nothing to do with it? (his example)