The Hopkinton Center for the Arts will host the Wicked Pickle, a pickleball tournament fundraiser, on Saturday, Oct. 25, at the Metrowest YMCA Outdoor Center. The event starts with a beginner’s clinic at 8 a.m., followed by the tournament from 9 a.m.-5 p.m. Beginner and advanced doubles will play in the morning and intermediate doubles in the afternoon. There also will be food, music and raffle prizes. Costumes are optional but encouraged. For more information and to register, visit hopartscenter.org.