The players have completed their first two dungeon crawls and have been accepted into the Adventurer's Guild! While they may have some suspicions about the Guild and the people running it, the meta-deal is that the Guild is going to be used for narrative structure so we don't have to spend a lot of tweets setting up and justifying adventures. In addition, all new players that join the game from here on out will be Guild members, to streamline the roleplaying necessary to integrate them into the party.
An in-game benefit of Guild membership is that all players now have access to the Guild House in the Old City district. They can sleep and eat there for free.
Bonus feature: here's a Storify of the Guild initiation ceremony.