Rickles lived a very long, full life. It’s known that in the early 1960’s, he was quasi-associated with the famous Rat Pack in Las Vegas because Rickles was a stand-up comic in Las Vegas casino lounges and members of the Rat Pack would often show up at his performances.
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I remember him telling a story about Sinatra showing up late to one of his shows, which distracted the audience. Rickles yells out, “Hey Frank, make yourself feel at home. Hit somebody!”