The black exterior and the Harleys parked out front say biker. The back patio's ironworks spelling out the word "welcome" atop an acoustic guitar says hipster. The ocean mural says . . . Well, that one's a head-scratcher. Since 2008, Chopper John's co-owner, John McCormick, has combined his love of motorcycles and music into a biker bar with a hipster sidecar. With Sunday jam sessions and an eclectic mix of local bands on Friday and Saturday nights, leather-clad riders and skinny-jean-wearing trendies may not always agree on the evening's sounds, but the drink specials and lively scene keep both groups coming together for another round.