Adding a room to a room that's already playing

Just updated the system with a roam and a couple of Move's. Simple question really. I'm Using Alexa on all of my speakers, and is there a way (or a command) where she will play what I'm listening to in another room as well. For example, been using the roam in the bathroom and then want to carry on listening to where I'm at on the playlist in the bedroom, leaving the roam in the bathroom. I know I could hold down the play/pause in the bedroom before I get in (or out) of the bath, I just wondered if there was a command I could give that would then add another room to the song playing? Cheers