I thought Anka was an entertaining guest on Real Time. He still puts on a great concert. Unlike others in his age group, his voice is holding up.
I'm not quite in his age group, but getting there.. Over a span of more than 40 years, I saw Neil Sedaka three times -- first, as the opening act for The Carpenters, and then decades later there was a fine tribute to him at Lincoln Center. Most memorable to me from that event was getting to meet Paul Shaffer and Daryl Dragon and hearing Connie Francis sing "Where the Boys Are."