Tomorrow the pro-choice organization Personal PAC sponsors a free screening of If These Walls Could Talk at the Music Box Theatre (3733 N. Southport). First aired on HBO in 1996, and directed by Cher and Nancy Savoca, the movie tells the story of three women of different generations (played by Cher, Sissy Spacek, and Demi Moore) who have undergone abortions. A reception with free cocktails and hors d’oeuvres is at 5 PM, the screening begins at 7 PM, and a discussion follows. An RSVP is required; call 312-422-0005 or e-mail