Sunbeams: Xenophon provides some therapy for the heart By Harriett Ainsworth Contra Costa Times Posted: 07/10/2009 12:00:00 AM PDT THAT SATURDAY WAS THE HOTTEST DAY we’ve endured so far this year, and on the hottest part of that day, from 11 a.m. until 2 p.m., Xenophon celebrated with an open house, showing heart-warming demonstrations of…