I have a lot of great answers to this, but this one came to mind because I've been spinning it a lot lately: Dead Kennedys closing out their debut album with an at least a semi-ironic/semi-snarky cover of "Viva Las Vegas" was a great move. Guitarist Raymond Pepperell Jr. was and is a big Elvis fan, while lead singer and primary songwriter Jello Biafra (most of the DKs catalog was written solely by him, despite false claims from Pepperell post-lawsuit that the entire band were co-authors) throws in a couple of snarky lyric changes where he imagined the song's narrator using speed and cocaine to power through his gambling and partying marathon. Plus, where else are you going to hear 6th chords in a punk song (except for maybe the Minutemen?).