Very much a return to Moby's electronic roots, almost harking all the way back to his debut album, but mixing in a more modern sound even including some rap. And why not? Last Night is, in the creator's words, supposed to sound like a night out in New York. Not having experienced such a thing, I don't know if he succeeded or not, but I'll take his word for it as a New Yorker.
Certainly it's a very upbeat dance album, at least until "Degenerates", at which point it takes a U turn and becomes cruisy. There's also a "hidden" instrumental piece after "Last Night".