Use of expectancy and preference frameworks. But most people still show preference for private spaces. Control refers to choice of initiation and termination of the social interaction. Higher status people tend to have much more control. Women have less control than men.
Adults have more control than children, etc.
Control over social interaction and informational access is related to the design of the physical environment. Use of these is considered an insult, because it implies a lack of trust. In Poland it is more acceptable to sit quietly among others and not interact.