The charmingly eccentric singer-songwriter Jonathan Richman doesn't use the Internet. He doesn't own a computer. And he's not especially fond of telephone calls, either. When MOJO contacted him last year, he responded with a recording of himself reading an original poem aloud. When SFWeekly contacted him, he sent them a handwritten letter. So after I sent him a few questions in advance of Friday's performance at 9:30 Club, I was delighted to receive both: a handwritten letter, written in verse.