Conversation so far:
When was the premiere of the film, Dreamgirls?
Dreamgirls premiered on December 4, 2006.
Where was the premiere of the film, Dreamgirls?
The premiere was at the Ziegfeld Theatre in New York City.
When was the official release of the film, Dreamgirls?
Dreamgirls' national release, at regular prices, began on December 25.
Was the film, Dreamgirls successful when it premiered?
Dreamgirls received a standing ovation at the Ziegfeld Theatre in New York City.

Question: Where were the roadshow engagements?
Self-contained rewrite: Where were the Dreamgirls roadshow engagements?