I came across this article from October 19, 1947:
I tried to do some follow up to see when the first benefit dinner was in
1946. I haven't been able to nail down a date but I did find this photo and
information:
Frank Sinatra, Bobby Breen, Willie Shore, Irv Kupcinet and Phil Regan all
take part in entertaining the guests attending Dr Jerome D Solomon Memorial
Research Foundation dinner. The auction site that was selling the above
photo said it was an original press photo from 11/15/45. I haven't been
able to confirm that date and the year under the photo says 1946. If anyone
has more information can they let me know.
Scott