The participle δειπνοῦντα ('dining') is in the accusative case, functioning as a supplement to the implied subject of the surrounding context (likely a participle of perception or a verb of motion/state in the missing antecedent clause). This construction, where the accusative participle denotes an action simultaneous with the main verb's subject, is standard for Aristophanic dialogue but requires attention to the elided verb of the main clause to identify the actor. The specific pairing with Λεωγόρου (the genitive 'of Leogoras') indicates a meal shared with this prominent Athenian, whose political career and subsequent trial for impiety (c. 415 BCE) provide a sharp satirical edge to the scene, contrasting the domestic intimacy of the dinner with the public danger Leogoras faced.