The first is on Saturday February 27th at 7:30 for a screening of Buster Keaton's The General (1925), and the second is on Saturday April 16th as part of a screening of Robert Altman's Gosford Park (2001). Both events start at 7:30 pm.
Period-appropriate costumes are highly encouraged and there will be a costume contest with prizes awarded each evening.

For more information, please see:
The General: http://www.driehausmuseum.org/programs/view/mix_mingle_at_the_movies_the_general
Gosford Park: http://www.driehausmuseum.org/programs/view/mix_mingle_at_the_movies_gosford_park