"Lamb Amerdam"

Mr. Laffler invites Mr. Costain to join him for dinner at a private club that he describes as a very special experience. To his disappointment, Laffler is informed that the house specialty, a lamb dish, is not being served. They continue to visit the club and one evening, the famous dish is served. It also happens that a long-time member has resigned. What, if anything, do the two events have in common?

Robert Morley is cast as Mr. Laffler, a gourmet who is anxious to be admitted into a private dining club called Spirro's. Ever since he was allowed to sample the specialty of the house, an exotic dish called "lamb armistran," Laffler has been prepared to move heaven and earth to join the club. Alas, when the curious Laffler sneaks a forbidden peek into the club's kitchen, he learns all too well the meaning of the term "lifetime member."

Yes Phoenix! You've got it! That's the one. I remember reading it, but I guess I didn't see it, because I would certainly have remembered Robert Morley.

The other one suggested, about the detectives munching on the blunt instrument, reminds me of one set in South Africa (I think) where the murderer grinds up the body into poultry feed and is famous for the quality of the chickens he/she - don't recall - sells at the local market..

Well!! You are one sick kitty, that's all I can say.