Bay seniors have their last chance this summer to pay nothing to see a film in the legendary Top of the Mark Lounge. On Saturday September 6, Clint Eastwood’s 1979 “Escape from Alcatraz” will be screened. Wine tasting starts at 5:30. The show goes on at 7:30. And if you can believe it, there is no cover charge and no ticket price. It’s certainly sounds like a cozier experience than all the free outdoor movies in cold parks and parking lots this summer.