The Potsdam Chamber of Commerce to host Fright Night tonight from 5 to 8 p.m. in downtown Potsdam. The free family event will bring together 66 participating businesses and organizations, with support from local candy sponsors. This year’s celebration will feature trunk-or-treating on Market Street, at Market Square Mall, 22 Depot Street, and at a new location in the Best Western Potsdam University Park Inn parking lot. Families are encouraged to visit all three areas and enjoy activities and games along Raymond Street. Participating businesses offering treats include Second Glance, 6 Market Street; Cotton & Bones Creative Co., 11 Market Street; Greedy Goblin Popcorn, 49 Market Street; Niles Asset Management, 50 Market Street; Northern Insuring Agency, 69 Market Street; The Third Wheel Pottery Studio, 22 Depot Street; and Potsdam Laundry & Dry Cleaners, 7 Beal Street. McDuff’s, Clarkson Construction Engineering Management (C3G), Potsdam Public Library, North Country Children’s Museum, Rotary Club of Potsdam, Potsdam PAWS and A. A. Kingston Middle School National Junior Honor Society will host tables offering treats, activities, and games. At Market Square Mall, families can paint a pumpkin magnet with The Third Wheel Pottery Studio and visit Lenny’s Haunted Hallway. Two Chamber member food trucks, The Happy Hive and Katie’s Kitchen, will serve food and beverages near the mall. Jernabi Coffeehouse, 11 Maple Street, will remain open until 7 p.m., offering hot cocoa and cider. The Chamber is partnering with JobsRUs to coordinate this year’s costume contests. Check-in will take place from 5 to 6 p.m. at JobsRUs in Market Square Mall, 22 Depot Street. Categories include ages 5 and under, ages 6–12, ages 13–18, Best Family Costume and Best Trunk. Winners will be announced at 6:30 p.m. at the BB9.3 tent on Market Street, with a $25 Potsdam Chamber gift card awarded in each category. The Wicked Witches of Norfolk will make a special appearance on Market Street at 6:30 p.m.