Are you 25-60 years old? Do you have a T-shirt or a flannel one free of pesky logos? Can you bliss out or rock hard believably to indie rock? Then get over to SONAR at 407 East Saratoga Street in Baltimore at 4:30 p.m. today for the chance to be an extra in a live-concert film shoot for Matt Porterfield's upcoming, music-soaked feature "I Used to Be Darker." Estimated wrap-time is 9 p.m. Porterfield is known for exploiting spontaneous interplay to the max, so who knows -- maybe you'll even get some on-screen face time. For more information contact firstname.lastname@example.org.