It is more confortable to have breakfast or dinner in the garden in summer according to the position of the sun and the air circulation. Later on if you are not crowded, and wish it; you can join the other guests, talk and introduce yourself and your country to them, share your toughts about saving the world from anything  or communicate your intellectiual views or even much better sing together dance and enjoy yourselves. There is no rule that you have to choose one of these alternatives.