Deck 5 still remains largely unchartered territory even now, but at least one crew member, in high spirits after a night of Nimbus3 Sherry, decided that exploring Deck 5 with only a torch and some Murray Mints was a good idea. He has never been seen since. Of the bits we DO know about so far:
This is kind of miscellany of the more strange parts of the Starship Overflow - documented as far as possible in this handy - well...handbook. Click each in turn to find the relevant page.