Americans like many people elsewhere in the world like to invite friends to their homes for the evening of food,drink and conversation.Formal dinners in fine homes and (hotels )in the US are much the same as formal formal dinners anywhere in the world.But as most people in the US have no servants,their dinner (parties )at home tend to be informal.Guests may sit down at a table or as many new small homes have no seperate dining room or very small dining space,guests can also serve (themselves )and eat in the living room,holding their plates or trays on their knees.
A more (enjoyable) formal entertainment is the picnic.Americans are greek picnickers,and almost every family has a picnic (basket).Summer invitations are often for a picnic at a park or in the (open) countryside.Unless hamburgers or hot dogs are cooked over the fire,picnic food is usually (cold).括号里的是答案