Leviton makes a very nice zigbee-based automation platform specifically for the “small commercial” market such as restaurants, small office buildings, bed and breakfasts, etc I would definitely look at that.
https://www.leviton.com/en/products/brands/lumina-gateway
Philips and Osram/Sylvania also make one for this market, but both are just lights.
https://www.osram.com/ds/installer/ds_installer_lighting_via_app.jsp
Control4 and Lutron also offer full featured systems, but both are aimed more at high end facilities, I think they would cost a lot more than the Leviton, and probably be overkill based on how you described your project. But do take a look at them, they may give you some additional ideas. The Lutron one comes in two different packages, one that is basic and one that is more high-end, and just looking at the differences between the two might also spark some ideas.
https://www.control4.com/solutions/smart-hotel
http://www.lutron.com/en-US/Products/Pages/SingleRoomControls/myRoom/Overview.aspx