Serenity will screen at midnight on Saturday, June 23. Proceeds go to Equality Now, and the Coolidge will be accepting food for the Greater Boston Food Bank. Tickets are $10. Joss Whedon fans will have chance to rejoice thanks to Coolidge Corner's midnight screening of Serenity, the full-length movie born after the 2002 cancellation of Whedon's short-lived but much-loved show "Firefly." The screening is on Whedon's birthday and will benefit his charity of choice,......