Area freelancers will host an expo of services, and local businesses are invited. The Freelance Exchange of Kansas City’s annual Portfolio Showcase will take place 10:30 a.m.-2 p.m. Sept. 28 at the Johnson County Arts & Heritage Center, 8788 Metcalf in Overland Park. There is no charge to attend the event. Parking is free, and a light lunch will be provided. The FX Portfolio Showcase will feature Kansas City-area independent…