I also have this same issue. We were told we could stream multiple stations in-house at our salon (4 zones) Now if we have more than one station on we get the "someone else is listening" message as well as it stops all the other music. We have had success with using Spotify in the other zones as it seems to allow us to split, the ONLY problem is Spotify does not recognize the "non-explicit" filter on the Sonos web player so you have to seek out "clean" playlists and trust that they were curated properly. Nothing like a good blink 182.."Did you hear? He fu**** her!" playing in the salon on a supposedly "clean" station. I understand why Pandora has to limit the zones your music plays in per account, but they could just develop a Pandora Commercial Use account type. I don't get paid the big bucks though.
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