Of the many players that rounded out the cast of NBC’s The Office, Creed Bratton offered the most unusual blend of laughs and intrigue, especially that episode where he takes a guitar and completely shreds a blues riff. Turns out, the series’ joke about Creed being in ’60s psychedelic band the Grass Roots and touring with Janis Joplin was completely true. These days, the classic-rock guitarist and band leader is still sizzling on stages around the country, touring in support of his latest album, Tell Me About It. Creed Bratton, along with Dirty Cello, comes to City Winery on Wednesday, Aug. 12, 1030 Main St., Napa. 8pm. $19. 707.260.1600.