If the school system all used the same calendar software, they could all be combined easily.  For Now I will continue to try to embbed these as best I can.
I am working on a web bot to combine the Chamber, the community center and the middle school.  To add in the 3 public and 1 private elementary seems at this point to be a bit too agressive.

Chamber of Commerce Calendar of Events
Geneseo Middle School
School Calendar 2012
School Calendar Days Off 2012

I don't see any organized schedule for the Community Center.  If you know of one, please direct me there, and I will share here.
Community Center Hours
through March 25, 2011
Monday - Friday                        Saturday & Sunday
8:00am -  9:00pm                        8:00am - 5:00pm
Members only
Mon - Thu       5:00am - Midnight
Fri 5:00am - 9:00pm      Sat 6:00am - 5:00pm
Sun   6:00am - 11:00pm