What's the Kennection? #46

What dance from southern Spain uses a style of handclapping called toque de palmas?

What 1970s TV series starred William Conrad, who described himself as "an overfed walrus," as the title private eye?

What city was left 85% underwater after the famous acqua alta of 1966?

What "Moaning" ghost lives in the first-floor girls' bathroom at Hogwarts?

According to Barry Manilow, at what club did the bartender Tony have an ill-fated romance with the showgirl Lola?

What's the "Kennection"?