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Explanation: 'Social interaction(s)' would seem to be the most readily understandable term and is also a recognized term in sociology.
See the reference below, particularly the sentence beginning 私たちが社会的相互行為の典型として思い浮かべるもの、例えば、挨拶、談笑、口論、喧嘩、セックス、恐喝、等々 which would all count as 'social interactions'