Use Sonos Play 1 with parents. Z. Z. Connected in your own apartment?

I have 4 Sonos Play 1 boxes - all already set up in my apartment - and would like to take 2 boxes with me to my parents for Christmas.

There's of course another WLAN there.

The Sonos app is installed everywhere on my tablet, my smartphone and my laptop.

Can I do it easily or do I have to set up my parents' boxes again if I want to use the boxes there?

In my apartment, all boxes are assigned to rooms. Then how does it work?

Or is it enough if I connect the boxes to the power and then they work. Even if it's not my apartment with the other Wi-Fi

You have to set up the boxes again

Thank you!