Classes and events last about an hour and are free, but advance registration is required; call 324-4345 to register. Thursday, Nov. 21, at 2 p.m.: "Relieving Hip and Knee Joint Pain for Active Adults, Dr. Scott V. Slagis. Tuesday, Nov. 26, at 1:30 p.m.: Alzheimer's film, Momentum in Science, Part 2: Grandpa, Do You Know Who I Am?, with Maria Shriver.