Bill Monsen, Principal of Monsen Energy Consulting Group LLC, will speak to the Rotary Club of Castro Valley on “Uncovering some of the mysteries of the electric utility system that is so critical to all of us.”  A buffet lunch and the program take place at Redwood Canyon Golf Course (17007 Redwood Road, Castro Valley) from 12:00 to 1:30 p.m. The buffet lunch is $20, and reservations must be made by 9:00 p.m. on Sunday, January 12 at castrovalleyrotary.org.