What’s cooking in the Napa Valley Opera House Jazz Kitchen this week? At first glance, the twangy banjo might not seem to match well with smooth-as-mayo jazz, but after witnessing Bela Fleck with the Marcus Roberts Trio, you’ll see they’re as odd and excellent of a pairing as cheddar cheese and apple pie. Give them a taste test on Tuesday, Sept. 4, at 8pm. $60—$65. . . . If that doesn’t suit your palate, try velvet-voiced Madeleine Peyroux and Brit-born Rebecca Pidgeon. After Pidgeon opens the night with some Ruby Blue folk pop, Peyroux performs with her signature “postmodernist coolness” on Saturday, Sept. 1 at 8pm. $40—$45. . . . Where’s all this going down? At the Napa Valley Opera House, 1030 Main St., Napa. 707.226.7372.