There's an official channel on YouTube of The Dick Cavett show with tons of his interviews from the 70's, 80's and 90's. If you can think of a famous movie star, musician or comedian from that time period there's a good chance he interviewed them.
There are way to many to mention but a few of my favourites were John Lennon, David Bowie and Danny Kaye. There's some pipe smoking in the Hughe Heffner and Sir Ralph Richardson interviews, apparently Ralph would smoke his pipe while riding his motorbike. Anyway here are a few links:
This is my favourite episode, it has Norman Mailer arguing with everyone from Gore Vidal to Dick Cavett and the audience
Then there's the great Don Rickles who has a brilliant bit of banter with Dick
Hugh arguing with a couple of feminists while smoking his pipe
Sir Ralph talking about his parrot and piping while riding his Norton
And the legendary Danny Kaye