For a party, you should be wearing shoes that are comfortable as well as matching your outfit so they can complement your overall look.
For Men - If you are wearing formal attire, then formal shoes and loafers will go the best with it. If you are wearing a casual outfit, then slip-ons, sandals, or casual shoes will be a good choice for footwear.
For Women - Women can wear heels, embellished flats to a party depending upon the outfit. For a more quirky look, women can also experiment with funky and colourful sneakers.
For Kids - Sneakers, sports shoes, slip-ons, ballerinas are the best to wear for parties.