“I feel as though I should be three pints in and yelling at you from across the table,” Oscar Villalon, grinning, said to Greg Sarris, also grinning, as they conversed in Jack Kerouac Alley. Sarris is more than game; his Native American sense of humor might only be exceeded by his sense of occasion. City Lights Bookstore organized July 23’s discussion of The Last Human Bear, the acclaimed author’s first novel in nearly 30 years. “At the time of contact, there were approximately 20,000 of us in Northern Marin County,” Sarris said of his Native American heritage. Greg Sarris in conversation with Oscar Villalon in the hubbub of Jack Kerouac Alley.