In you are using Home Assistant, I found this great HACS for Sonos.
https://github.com/johanfrick/custom-sonos-card
It allows easy grouping/ungrouping, ,individual and group volume control, quick my sonos or stations selector.
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Hi
Thanks for sharing!
I’ve recently started to use Home Assistant myself, and I’m quite impressed with the huge array of things it can tap into and control. 
Love my home assistant
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