Two couples. Which has the better, more stable relationship? Or...neighbors, happily co-existing, at least at the start of the party (this is the corner of a hotel events room -- I know the context because I was there -- does a sense of context leak into the frame?). It caught my eye, of course. Symbolism unforced, not really even thought about until I wrote this paragraph. I swear on a stack of Gideon Bibles (which they don't have in England) that I'm intuitive.