I loved these names the first time I read them.
Hopefully with an increased launch cadence SpaceX will need more barges, one for each launch arena. The current two are names of GCUs from "The Player of Games"[0]; extrapolating that gives us only Flexible Demeanour
Of course since Elon plans to motion to Mars he'll need a proper ship name... Might I suggest Synchronize Your Dogmas for that one.
[0] - https://en.wikipedia.org/wiki/List_of_spacecraft_in_the_Cult...