Thank you for the links, I've read both of them. And both require iCloud.
No one in the company, including me, is willing to sacrifice their personal iCloud to host the company calendar.
Personally, I synced my iCal with my Android using CalDAV and a German calendar server for 10 years without using iCloud. Worked perfectly. I now use iCloud, and it works most of the time.
I should be able to use the networked computers (local network) to "host" the calendar in house. There are shared folders. I suppose we could use drop box, Google, or go back to Fruxx, but there should be a way to do it on the local machines. If I knew more about local networks, I should be able to pull the address of a shared folder, and use it to host.
Actually, I was pretty amazed to find a complete group of 6 functioning i7 iMacs.