Sonos is not ideal for use with a microphone, due to the buffer needed for multi-room and no ability to mix inputs.

have any suggestions?

Look into a PA system that will allow multiple inputs; Mic, music source, etc. to be mixed together for output.  No recommendations here, but there are hundreds out there.  

Try here, they are reliable folks.

https://www.crutchfield.com/m_412750/PA-Systems.html