MmmBop! Yes, that’s Hanson with Bob Weir. This surreal harmonic convergence went down at the tenth anniversary of New York’s eco-crunchy rock club, Wetlands, where Weir played three nights with longtime collaborator Rob Wasserman and drummer Jay Lane. “We’re having a lot of fun with these shows,” Weird said. HAnson joined the party for the second night’s encore, playing expertly on “Going Down the Road Feelin’ Bad,” “Gloria,” “One More Saturday Night” and “Good Lovin.’”