PITTSFIELD — Several social service agencies and a college are collaborating with Berkshire County Arc to hold the Berkshire Disabilities Legislative Breakfast March 29 at Berkshire Hills Country Club.They include Ad Lib, Inc.; Autism Connections; BAROCO Corporation; Berkshire Family & Individual Resources, Inc.; Brain Injury Association of Massachusetts; Department of Developmental Services; Goodwill Industries of the Berkshires; Guidewire, Inc.; Massachusetts College of Liberal Arts; Massachusetts Rehabilitation Commission; ServiceNet; and United Cerebral Palsy Association of Berkshire County.