Here’s an awesome idea for re-using your old wine corks into placecard holders. I can even see this being used for something else such as your business cards.
Simply cut a slit in your wine cork and cut the bottom off so it won’t move.
If you like, you can hot glue a magnet strip to the bottom of the cork placecard holder. If your table happens to be metal, this will keep it in place and weighted down. If not, you can slip an adhesive magnet under your table cloth to make sure it stays in place.