Need multiple Sonos accounts on 1 system

Try force closing the SONOS controller when moving to the other house. I think that this will cure the Spotify issue as long as each of you is using your own account. I don’t know how other premium services might react.

So thanks for the replies. The fix suggested by @Ken_Griffiths isn't quite the issue or the solution that worked. I checked this case before and found out that her app was using her Spotify account and my app was using my Spotify account, so it's not a matter of getting the right Spotify to stream at both houses. They just won't work simultaneously across houses. But fine when at the same house on different speakers.

I will have my wife try the force close at the other house...if I can get her to take a second to want to debug some tech. It's like her favorite thing to do...NOT! @buzz are you saying to force close the app from IOS on the phone or "reset app" from the Sonos app menu?

Seriously this is herd to diagnose simultaneously over two geographic locations and the other person would rather stick a fork in it rather than fix a Sonos issue. Lol

First try “Force Close”. ”Reset” requires more work to bring the controller back online. Your wife will lock the door.

Refrain from Factory Reset.

I think this depends on what exactly you mean by “using the same account”. You can use the same email address on multiple Sonos Households without issue (the household ID is included in the data that is sent to Spotify for playback). I do NOT recommend using the same Sonos Household in multiple locations though (which you can do by physically moving one or more speaker to the other location without a factory reset, a kind of pseudo-divorce). You can see a version of your Household ID in Settings / About my system. Once “fully divorced” into two Households (via a factory reset in one of them) you will need to add your Spotify accounts to the “fresh” household.

This is my best guess from your scenario. I run multiple systems in multiple locations, but have never attempted simultaneous playback as you do. I use “fully-divorced” systems.

Ah thanks @controlav , that's an interesting angle to consider. I wasn't aware of the Household ID parameter on the system. I actually don't see a Household ID under my settings / About my system. Is it the "Sonos ID" I see there? Is the idea this value should be different for each house I'm located at and using the app?

And so I can have a separate Household ID created by factory resetting the the system or the controller at one of my houses? I suppose I wonder why a new Household ID wasn't generated automatically when I set up the system at the new home on a new network? But I suppose there's a good reason for that.

Wait… I’m still not getting this.

There is a Sonos system in our house.

“I” have a Sonos Account (login)

“I” stream my Apple Music Library music to my Sonos system.

How the heck do the other members of my family stream “THEIR” Apple Music libraries to the Sonos system in our house?

Read the multiple accounts per service FAQ. 

Sorry, but does EVERYBODY who plays THEIR music through my Sonos have to have their own Sonos acct?!

Somebody comes over; they want to play me a song they have on their iPad.

They have to create a Sonos acct first?

(but thanks for response)

No, certainly not. In your specific case (music on an iPad), they would just use AirPlay 2 to send the song in question to your Sonos speaker (that is AirPlay 2 capable), and it would play. Or, since they’re in your home, they could download the Sonos controller, and access the streams/playlists you’ve set up on your system, and find the music from your streaming sources, and play it from there. No need for them to have an account for either. But that wasn’t what the OP was asking about. 

@Snaggle Are you sure you and your wife were using different Spotify accounts? Spotify should not stop playing in one location when you start playing from a different Spotify account on another location. Sonos will however revert to the last used Spotify account on a speaker when you ask it to play something by voice. So if you would have used a speaker on your Spotify account and your wife would ask for a song by voice, the speaker would use your Spotify account to play it, causing your music to stop in another location.

If this is not the case, I’d make a diagnostic on both locations once this happens and call Sonos about it.