Hi all,
We have one Echo in the Kitchen and 3 dots in bedrooms. The morning routine consists of asking Alexa to play the radio, when one of us goes into the kitchen. During playback she occasionally mutes the music, as if she's heard her name, timesout and carries on. It turns out that this coincides with someone else asking their Dot questions elsewhere in the house.
There are no groups, scenes or routines set up with the app.
I had registered all of the dots and the Echo under the same Amazon account, in order to aid Drop-In for my household only, i.e an intercom for all. That's another story.