Bay seniors, who find Charlie Rose only whets their appetite for more intellectual stimulation, might want to consider auditing a class or two at UC Berkeley. The range is vast, from Cognitive Science to Hindi-Urdu, Cueniform to Medieval Paleography, more than 7,000 classes which you can winnow down to your select few here. There appears to be no paperwork required but it’s still best to ask the professor’s permission. In a crowded lecture hall you are expected to sit, or stand, near the back. Free, of course. Your taxes pay for this. I imagine any local higher learning institution has a similar policy.