Thanks to Michiel Visser, who pointed me at Box Office Mojo which shows us some figures for Damsels in Distress.
As of 15 April 2012 the movie had made $167,644, with $58,589 of that on the opening weekend. That weekend it opened in four theaters and was ranked 44 overall. Its widest release (presumably at the moment) was/is 22 theaters. Worth keeping an eye on perhaps.