This company has been partnering with various studios to stream "one night only" events into movie theaters for a few years now. I became aware of them because of their doing the Rifftrax live events (which have been great).
Anyway, Over the past year they've partnered with TCM for streaming classic films into theater big-screens and I've really enjoyed seeing Casablanca and Singin' in the Rain in theaters with a great audience (packed, each time!). They have several awesome movies coming up, and I just wanted to pass on the info:
http://www.fathomevents.com/genres/Classics.aspx
The Birds Sept. 19
E.T. Oct 3
Lawrence of Arabia Oct 4
Frankenstein/Bride of Frankenstein Oct 24
To Kill a Mocking Bird Nov 15