Visit loftcinema.com for a complete list of forthcoming films and to reserve tickets. Saturday, Sept. 8, at 10 a.m.: Bag It, a comic documentary about the life of plastic bags; free. Saturday, Sept. 8, at 7 p.m.: Grease Sing-Along; $5 to $9 includes a Grease goodie bag. Tuesday, Sept. 11, at 7 p.m.: General Education, followed by a Q&A with director and co-writer Tom Morris and producer and co-writer Elliot Feld; $5 to $9.