Streaming Google Play Music to a single room

[stoofa]

All of the music I own is currently in Google Play Music (the free option). I don't pay any subscription, it simply contains music I've bought and have uploaded.
I'd like to be able to stream this music - randoms and playlists to a single room.
What is the best way of going about this?
I'm assuming I would use a laptop/PC or tablet to do the actual streaming and then simply output to a wireless or bluetooth speaker?
Unless there is a device that could do the streaming too?

If I have a wireless speaker, can that be attached to the wireless network and I could stream via another machine on the same wireless network or a machine wired into the same network? Or is it direct output from machine to speaker?

Up until now we've only listened to the music directly from our PC running Play Music. First time I've had the requirement to be able to play this same music in another room that doesn't have a PC in it

Cheers.

 

[stoofa]

Cheers for the replies.
I don't have a Google subscription - I have all of my music stored in Google Play, but I'm not paying for access to their streaming content.
The room in question is the "main room" so to speak, so I've got an Onkyo surround sound setup, so I'm guessing I might be able to add the CC to one of the inputs on this?

 

[stoofa]

Just as a final question.
So I have an Onkyo setup. The amp has 4 HDMI inputs, I'm currently using two for our SkyHD Box and the PS4.
So I could add a Chrome Cast (standard, not audio) via HDMI to one of the other inputs and then stream Google Play Music to it from say an Android Tablet or Windows PC?

Does the CC actually attach to the network? So could I stream from a PC that is hardwired into my network to the CC, or would it need to be something wireless?

Thanks again.

 

[stoofa]

Thank you all so much for your time/help.
So just for final clarification

I shall purchase a single CC (not the Audio, I'm only planning on streaming to this room).
I shall attach it via HDMI to my Onkyo Amp (to one of two fre inputs it has).
It will also attach to my WiFi I'm guessing.

I would switch to that particular output on my Amp, then, using an Android tablet or a Windows laptop I shall stream music from my Google Play Account (free, not subscription) and with any kind of luck sounds will surround everyone in the room via the 5.1 speaker setup.

Cheers!