I was informed by a knowledgeable source: this mosaic must represent a scene from a comedy, even though the participants don't look like they are having a particularly good time. The inscription above the figures is one word: synaristôsas ("the women breakfasting together"), the title of a comedy by Menander (should be synaristôsai). There is a mosaic at Mitylene illustrating the same play, and also one at Pompeii. The one on your site is signed by Zôsimos at the bottom, as the view in picture 8156 shows (Zôsimos epoiei = Zosimos made [it]).