Playing different music on multiple homepods

At my business I have 10 different HomePod Minis in different rooms. I was hoping to be able to have each device play its own playlist or music. I have a subscription for Apple Music but it's not a family plan (rather an individual). It just seems like overkill to get a family plan when all devices are under the same Wifi and roof.

The goal was to have all the rooms be able to play different music without a smartphone in hand. A simple, "Hey Siri, play spa music" in one room and a "Hey Siri, play meditation music" in another.

Are there any solutions to this? Workarounds?