Adding sides to a gazebo can definitely help make it more suitable for winter outdoor events. Sides on gazebos serve as a great barrier against wind, which can be one of the biggest challenges during colder months. For a festive market, clear PVC sides can still allow light and visibility while protecting your guests from the elements. To further enhance comfort, you can also consider portable heaters to provide warmth inside. Overall, gazebos with sides can create a cozy environment, but it’s important to think about heating and ventilation to ensure everyone stays warm without getting too cold or stuff.