With three 10-foot Doggie Diner heads appearing on John F. Kennedy Promenade in Golden Gate Park, historian, maker and Doggie Diner collector John Law joins hosts Peter Hartlaub and Heather Knight to talk about the phenomenon. The history of Doggie Diner includes detours into Dan White and Jefferson Airplane, with more recent stories about the preservation of the heads. And Law also talks about the Suicide Club and Cacophony Society, two local urban exploration and pranking groups that influenced everything from Burning Man to SantaCon. Produced by Peter Hartlaub. Music from the Sunset Shipwrecks off their album "Community," Castro Theatre organist David Hegarty and cable car bell-ringing by 8-time champion Byron Cobb. Follow Total SF adventures at www.sfchronicle.com/totalsf  Learn more about your ad choices. Visit megaphone.fm/adchoices