The Knoxville Chamber of Commerce is busy with a couple of activities this weekend. Tomorrow night, they’re teaming up with Knoxville Movies in the Park for a showing of “Ghostbusters” at Auld Park. Families are encouraged to dress up in Halloween costumes, and there will be candy and hot chocolate courtesy of the Chamber and local businesses. The movie starts at sundown. Saturday, the Chamber is hosting their annual fall auction. Tickets are available for purchase at the Chamber or at the door at Dyer-Hudson Hall Saturday. Things get started with a social hour at five and dinner at 6pm.