The Grateful Dead icon will open the Greek Theatre's summer season with his band Wolf Bros Aidin Vaziri July 22, 2021Updated: July 22, 2021, 5:25 pm Bob Weir is looking forward to returning to the road. Photo: Carlos Avila Gonzalez / The Chronicle Last year marked the longest period Bob Weir had gone without performing in front of a live audience since the Grateful Dead played its first show in San Francisco more than 50 years ago. “Several times the longest!” he said, calling last week from Hawaii. Weir didn’t take the pandemic lying down. After COVID-19 put his plans on hold for a spring tour with the Wolf Bros and a summer trek with Dead & Company, the 73-year-old musician dived into a series of projects at home.