The particular listener-friendliness of later eighteenth-century music is no secret; it has been an article of faith for some more recent writers, but has not that often informed the basic approach to this repertory. Theories of rhetoric, schema or topic are certainly premissed on such an understanding, but do not necessarily address what the author believes to be a central aspect of the musical aesthetics (and indeed of the wider culture) of the time: sociability. Yet music, especially instrumental music, arguably forms the most powerful expression of sociability that has reached us from that time – not merely reflecting wider practices but actively providing models for human behaviour. I discuss some of the common syntactical mechanisms that convey the sociable impulse, in line with Judith Schwartz's definition of an art that ‘communicate[s] by means of pattern rather than momentary passion’, and with particular reference to Pleyel, J. C. Bach and Haydn.