Outdoor movie fans will have a trio of Eastside options this weekend. Tonight in Echo Park, the Echo Park Film Center’s Filmmobile will be parked at Glendale Boulevard and Effie Street to screen the first of a series of silent films by Mack Sennett, who set up shop 100 years ago in Edendale, what is now Echo Park and Silver Lake. In fact, the 8 p.m. Salute to Sennett will take place across the street from Sennett’s studio – now a Public Storage facility located behind a Jack-in-the-Box (how’s that for Hollywood glamor?). Meanwhile, in a more rustic setting, the Audubon Center at Debs Park will screen a nature film, “Legend of the Guardians: The Owls of Ga’Hoole,” as part of its Film Friday series. Then, on Saturday night, Heritage Square will show the 1953 version of “Titanic” as part of its summer Silent & Classic Movie Nights.