There have been quite a few bands in the past year or so that have been cut from a similar indie-dance-pop mould to Friendly Fires and Two Door Cinema Club.
One such band that flirts with a similar style is North East England based 5-piece Athletes In Paris. On their track "Heartbeat", the band go from an acoustic intro into a high energy slice of indie-disco friendly alt-pop, complete with robotic drums, funky guitars and a chorus as big as the Eiffel Tower. It's fun, it's instant, it clocks it at less than 3 minutes. What more could you ask for?
"Heartbeat" by Athletes in Paris is available to download for free from the band's Bandcamp page, complete with 5 remixes (including a rather snazzy French house re-working)