An unassuming gray PolyPortables Inc. restroom has struck a chord with musicians and achieved backstage celebrity status at the annual Country Fever music festival in Pryor, Okla.And no one’s happier about it than Tammy and Stacey Hillis, the president and general manager, respectively, of At Your Service, a portable sanitation business in nearby Tulsa that services the huge music celebration. Bringing new meaning to the words “signature service,” the restroom is covered with 75 to 100 autographs of musicians who’ve played at the country music extravaganza for the last three years, reports Tammy Hillis.“Stacey came up with the idea —
