As for the title track's particulars, the weird beats and the airy synths are what most distinguishes fun. from the Format, aside from their use of punctuation and capital letters. "On Your Porch" has the same slow, shambling build-up, but your best bet is "Career Day," another portentous song about success and anxiety--available here in the interpretive-stock-photo medium peculiar to YouTube:
For all that, though, the Format wasn't fun.--what you get, in exchange for the loopy danceability and the autotune, is a bunch of really great straight-ahead rock songs. The good news is that, having just gotten into Some Nights, my hypothetical fun. fan friend, you can have both.