Looking for Fun Halloween Costume Ideas for Couples? It really is never to early to think about finding fun Halloween costume ideas for couples, especially if you’re going out to a Halloween party. Most gatherings will even give some sort of reward for best Halloween costume -- even if it is just another piece of delicious chocolate. Trick or Treat! This year when you go out make sure you have coordinated your best ideas for couples costumes and you put all your creativity into making a fun and memorable night.