Strong G9301συνδειπνέω

to dine or sup with another, with dative, (Xenophon Historicus); μετά τινων (Demosthenes Orator):—;absolute to dine or sup with others , (Xenophon Historicus), etc.; οἱ ξυνδειπνοῦντες the members of a picnic party , (Xenophon Historicus) (ML)