Nico's does. When homemade, soup is nourishing -- often full of veggies and always rehydrating. Plus, a mug of piping-hot soup is simply an enormously pleasant lunch experience. The wonderful aromas float up on the steam, the mug gives your hands a satisfying warmth, and the heat forces you to take tiny spoonfuls, slowing down your lunch to a leisurely pace.
I make myself a giant pot of soup at least once a month, eating some and freezing the rest in individual portions for lunches. Trouble is, I get bored eating the same lunch all month. I recently made a delicious pot of butternut squash and pear soup that was flavored with a vanilla bean steeped in cream. Amazing. Awesome. Ambrosial. . . . Until I had to eat that sweet soup for the 8th time. (As you may know by now, I'm not a huge fan of sweetness as a dish's main taste experience.) I was so over that soup by the end of that month.
2. Set the rules. Since we had one vegan and many who don't eat much meat, we choose to make only vegetable-based soups. I recommend going meatless, as it makes for a lighter lunch. Either way, consider your guests' dietary restrictions (vegetarian, Kosher, allergies, etc.).
3. Make and package your soup. After you prepare your soup, put aside 2-3 cups for the soup party (see below). Then package individual, 1 1/2 cup portions for each guest in plastic, zip-top freezer bags. Label your bags of soup. If you need to make your soup in advance, freeze the bags, laying them flat (to save space). Print out a copy of your recipe for each guest.
4. Taste the soups. At the party, have a "soup tasting" for lunch. As mentioned, each mom brought about 2-3 cups of her soup for the others to taste. I set out mugs and spoons and we tasted as many as we could. A salad and some cheese rounded out the lunch.
A tip for defrosting your soups: If you forget to move a bag of soup to your fridge the night before (or to your counter in the morning), just put the frozen bag into a bowl of warm tap water for a few minutes, until it softens up. Then snip the corner of the bag, squeeze out the soup, and warm in the microwave as usual.