Dear Omni's Web 'Mustard' :), two links at the Events section of the main page need to be updated:
https://omnicommons.org/index.html#events 

"

Events

You can request space for your own event, or come to an event on our calendar.

"

The drop down window of the top menu has these that work:
Calendar: 
https://airtable.com/app2DwPw0H2HKsiWv/shrxXjo869sxBzHmr

Book an Event: 
https://airtable.com/app2DwPw0H2HKsiWv/shrlK0lnDblYnim9I 

Thanks,