And of course https://www.google.com/#q=wifi+for+hotel

You didn't broach the subject of if you were charging for such and more but the names do sell the gear for you to self install. Support would be from them but it is possible for a network savvy person to get basic wifi services.

Again, the gear is out there.

Now there is a trap that you must avoid. Folk will want tech support over things like my WiFi won't turn on and more. At most you can show them your laptops work but must avoid the tar pit that is a Windows PC.