My husband and I can do a spirited rendition of Bohemian rhapsody where we change up who sings the main bits very smoothly, but nobody ever asks us to do that.
I have hypermobile joints, so I can bend so far it makes peoples gag reflexes kick in. I also speak 3 languages, have a pretty good memory for song lyrics and texts, and will perform anything from childrens rhymes and theme songs, to first aid mnemonics or Ibsen,depending on the audience. I'm a good cook, and friends with a lot of people who aren't, so feeding a bunch of people is my most popular party trick.
DH plays the guitar along with several other instruments and sings really well. In addition to this he retains more lame science jokes and wordpuns than is reasonable (they make me laugh pathetically hard), and can launch into a Mitch Hedberg - like routine from outta nowhere.