CONCORD, N.C. — Alsco, a pioneer in linen and uniform rental services, has joined forces with one of racing’s iconic tracks, Charlotte Motor Speedway, for a historic entitlement sponsorship of the Alsco 300 on May 26. Alsco’s groundbreaking sponsorship of the Alsco 300 at Charlotte Motor Speedway coincides with the 40th anniversary of the inaugural running of one of the crown jewels on the NASCAR Xfinity Series schedule.