Bob and I always celebrate the first pot of chili of the season. A soup supper is fairly easy to set up and host. Using slow cookers you can set up your soup on your island, kitchen counter or table. You may serve the soup or allow the guests to serve themselves. Provide any garnishes you wish such as cheese, croutons, sour cream, etc. and bread or crackers if you wish.
Add your favorite people, beverages and dessert and you have a party. You could make this a pot luck dinner and invite guests to bring soup or dessert to share if you desire.