Don and Shirley Weston have come to the Scardale Hall Health Hydro to relax, pamper themselves and possibly, just possibly, rescue their ailing marriage. Don proves himself hilariously incompetent at step aerobics, squash and slide aerobics, and his experiences with colour therapy and massage are far from positive too. Is the Westons’ week doomed? The rifts in the marriage widen as Don’s mid-life crisis becomes more and more evident, and moments of reconciliation – a midnight feast, for example – do little to improve the situation. Darkly amusing, perceptive and troubling, Gym and Tonic is a comedy with real bite.