A note on serving styles:
The Repositorium (my favourite) is of course a buffet ,great care would be taken to produce attractive display dishes .Guests helped themselves without much assistance from slaves.
Roasts-brought in whole and carved by the specialised scissor slave in an elegant manner (sometimes to music)
Plate service-like a modern restaurant-not much enjoyed by the fashionable seen as unsociable and vulgar (barbarians -note this, and no licking the meat juices )
A table each-the old Etruscan mode ,similar in many ways to Japanese dining .Elegant but rather restrained
Athenian style -buffet but individual tables-not popular,mainly like haute cuisine today-not enough grub.
and I leave you with a stinging rebuke of Celtic customs " they eat a little bread ,but great quantities of meat ( boiled,grilled or roasted on a spit). They may eat hygienically ,but they do so with bestial greed"(Athenaeus )