Nice! I have that as well (I used Bob_NL’s Radio as an example for the codes), but I combined it with multiple conditional mini media player cards inside a vertical stack-in-card (depending on what speaker is on) and use it as a popup card for Spotify on my Lovelace view 
(Also wrapped all the mini cards inside a swipe card so I can swipe media players in case different sources are on). Pressing the Spotify button (added a button-card inside the vertical stack-in-card between the dropdown menu and mini media player cards) starts the script.
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