Conversation so far:
What is Red Skelton's Doughnut Dunkers?
The Doughnut Dunkers was a pantomime sketch, which Red Skelton wrote together with his wife, Edna Stillwell, and launched a career for him in vaudeville, radio, and films.
Who was Red Skelton's female partner?
The Doughnut Dunkers was a pantomime sketch, which Red Skelton wrote together with his wife, Edna Stillwell, and launched a career for him in vaudeville, radio, and films.
Where did Red Skelton and Edna Stillwell do the Doughnut Dunkers routine?
The Doughnut Dunkers routine won Red Skelton and wife Edna Stillwell the Loew's State engagement and a handsome fee.

Question: When did they do this?
Self-contained rewrite: When did Red Skelton and Edna Stillwell do the Doughnut Dunkers routine at Lowe's State engagment?