Hi @Eval11 

For a commercial property, I’d recommend the use of Sonos Amp and In-ceiling Architectural speakers. With that combination, you can connect up to 6 speakers to each Amp. I recommend putting the Amp(s) into Dual Mono mode, so each speaker plays both channels of audio.

As for placement, I think that best left for the installers to figure out, working around AC and whatever else is installed in the ceiling, but I think 6 speakers in the main section would be sufficient. I’d recommend one speaker on each side of each doorway to start with, and another two in the middle.

I would also install a speaker in each toilet - these could be on a separate Amp if you want a different (lower) volume in there.

If you want the kitchen staff to have music too, that would require another Amp (assuming 6 speakers in the main section).

However, this is most definitely not the cheapest solution - just the tidiest. Self-contained speakers may be a preferred fit, in which case you could just install several Era 100s on wall-mounting brackets.

You may also want to look into our Sonos Pro programme, tailored specifically for small/medium businesses.

I hope this helps.