1. Get the house grouped together with the TV-input the Beam is getting (so the whole house is playing the TV, single group)
2. Get the living room playing what the rest of the house is playing (have it join the house/everywhere group)

I have often used Alexa triggers to string together more complicated actions together, but I haven't had luck with Sonos's groups. I saw some past discussion with communicating to Sonos via Web Requests, but I could use some pointers if that's the best way. Alternatively, any chance of richer Sonos support?