It was a curious concept for Valentine's Day: 30 couples or so, plus some singles, clutching red roses and presumably their partners' hands, settling down to watch a performance - which showed marriage to be a mostly abysmal experience. Mixed Doubles is a set of eight good-old-fashioned British short pieces by two good-old-fashioned British actors, punctuated by wonderful jazzy love numbers sung by Canadian Peggy Mahon. But as for the title 'mixed' (a comic reference to one of the scenes set on a tennis court) I felt the evening was more about the same doubles over and over again. Neville Worsnop and Pat Boothman performed scripts by Alan Ayckbourn, Fay Weldon, Harold Pinter and others. The first scene was set on the train to the honeymoon hotel (which dates it already: most people today would be on long-haul to Honolulu) with the husband horribly anxious about sex and the woman always talking. There were funny moments, and some good lines, and I did laugh. But as the evening progressed towards the final scene set between an old couple in a graveyard, it became worryingly apparent that the joke, or at least the set-up, was always that the woman was nagging, the man long-suffering. Had I seen the programme in advance, I'd have gambled a lot of red roses that Pinter would have provided the darkest moment of the evening. But not at all: his sketch was set in a cafe as a long-married couple remember fondly though vaguely back to their first meeting and their first walk. It was by a canal, no. . . it was down a road into a field. . . I stood behind you and touched your breasts. . . no, you were in front of me and looked into my eyes. . . . It was delightful and positive: and its theme of long-running love provided the best reason all evening for celebrating Valentine's night at all. Today, 3pm and 8pm, Star Alliance Theatre, Fringe Club. $150 Fringe or Ticketek.