This is needed for music playing in the background at restaurants for example.
I'm pretty sure Spotify/Pandora's terms & conditions don't allow that:
https://help.pandora.com/customer/portal/articles/215200-pla...
https://www.spotify.com/us/legal/end-user-agreement/#s8
The terms may prohibit, but in my observations, I know of many restaurants and small businesses that do it anyway. I'm sure most ignorant of the policy, but how many would stop anyway if still known of it.
I'm pretty sure Spotify/Pandora's terms & conditions don't allow that:
https://help.pandora.com/customer/portal/articles/215200-pla...
https://www.spotify.com/us/legal/end-user-agreement/#s8