In the mid-1940s he became an executive of the Blaine Thompson Advertising agency, where he created and produced, together with his wife, Mina Bess, the daily radio talk show Luncheon at Sardi's.
On 9 September 1956, Elvis Presley appeared for the first time on the show, but on his third and last appearance on January 6, 1957 he was censored because the rumor had it that the rock'n'roll singer had been "hanging a small soft-drink bottle from his groin underneath his pants, and when he wiggles his leg it looks as though his pecker reaches down to his knee!
After 12 years, he left the Sullivan Show in order to set up an independent production company.
In 1967, Lewis joined the Norman, Craig & Kummel agency and was elected vice chairman a year later.
Both Lewis and Sullivan shared the George Foster Peabody Award for humanitarian activities.