Sold-out show at Scala as part of the EFG London Jazz Festival surprised some: Video

Sold-out show at Scala as part of the EFG London Jazz Festival surprised some: Video: “If you have to ask, you don’t know by now,” is perhaps an apt line from a Red Hot Chili Peppers song when it comes to the LA-duo Knower, whose sold-out show at Scala as part of the EFG London Jazz…