Haven't been there for 10 years or so but Melbourne Gaol is good as you can see where they hanged Ned Kelly, a plaster cast of his death mask and his armour.
If you like Cabaret/Dinner show type evenings, then Dracula's was a right laugh. Horror themed show involving comedians, jugglers, magicians etc. They like to involve the audience and the only thing they enjoy more than ripping into Pommes is ripping into Tasmanians.
I think you have everything else covered in your list, except maybe having a meal on the restaurant tram which runs at night and makes for an interesting, if slightly costly dinning experience.