Conversation so far:
When was the Premiere of Dreamgirls?
Dreamgirls premiered on December 4, 2006 at.
Where was the premiere?
at the Ziegfeld Theatre in New York City.
When was the official release of the movie?
The film's Los Angeles premiere was held on December 11 at.
Was it successful when it premiered?
Dreamgirls earned a total of $851,664 from the roadshow engagements, playing to sold-out houses on the weekends.

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