Here are some possibilities, depending on the context:
Places where food is not stored:
* Kitchen: While a kitchen often has a pantry, it's not a dedicated storage space for food.
* Dining room: This is where food is eaten, not stored.
* Restaurant: Restaurants have kitchens and storage areas, but not a "larder" in the traditional sense.
* Field: This is where food is grown, not stored.
Places where food is used or consumed:
* Table: Food is consumed at a table.
* Plate: Food is served and eaten on a plate.
* Stomach: Food is digested in the stomach.
Ultimately, the best antonym for "larder" depends on the specific situation.