Best answer by melvimbe
Long answer is that you can setup the Sonos ones as stereo pair, with a different room name, but place them in the same room as your Beam. When playing music sources, the two virtual rooms would play in sync. For tv, they would be slightly out of sync. You would also not be able to use trueplay tuning accurately for the two rooms.
You may want to look at the announced Sonos amp, as that can power passive front left and right speakers with a simulated center channel.