Creating a wreath of herbs is a great decorative way to keep the bugs way at your guests at an outdoor gathering. This is a great alternative to sticky sprays and smelly candles near your dinning table.
Here is a step by step directional on how to make a wreath and here is a list of herbs that keep insects away. Many of the herbs have beautiful flowers that would add color to your wreath. If you cannot find the buds of the flowers then just use greenery through the wreath and add one or two of your favorite flowers at the end.
You can hang the wreaths on the backs of your guests' chairs, around fence posts, on a wall, or lay them onto the table.