There are many options.
It is possible to enjoy a more relaxing dining experience outside. The interior of a establishment, bar or brewery can be calm in the sense that people attempt not to talk over each other in fear of loudly causing disturbance. Also, seating inside can get crowded fast, especially in the event that the venue is not sufficient in size. The option of going outside gives people the freedom to enjoy themselves and not worry about feeling confined or trying to fit in with other guests who have different experiences.
Outside seating is also an ideal option for someone who cares about their health. While eating inside it is possible to be exposed to bacteria and other contaminants that have had the opportunity to spread throughout your business day. Indoor air quality is typically worse than that in the outdoors and outdoor options are more beneficial for your health.
The document attached provides more details about the importance to choose places that have outside seating.