Get in the holiday spirit with a tree lighting ceremony at Golden gate Park. This is the 82nd annual holiday tree lighting, which will include live entertainment, fun activities, refreshments,  and a cookie factory.   Plus there will be train rides and a visit from Santa if you're into that sort of thing.    The event is free, including refreshments, the train ride and a photo with Santa.   Tree lighting itself will begin shortly after dusk. McLaren Lodge in Golden Gate Park. MUNI via the 5 Fulton, 21 Hayes, 33 Stanyan, 71 Noriega and N Judah lines.