Dancing at the Shanghai-A-Go-Go.
Discotheque used as a front for The Claw's Washington Headquarters.
As The Claw explains to Maxwell Smart, who he is holding prisoner, in addition to providing a useful front, the "raucous sound" of the modern-style music will smother Max's cries for help as he's being tortured.
[Episode #2: "Diplomat's Daughter".]