Sometimes you want to go into the theatre to have fun, to have sweetness, to hear a song you know, to listen to the ease of the artists. I saw this in three splendid evenings late in the summer. Two of these were at Barrington Stage. “See How They Run” was technically superb. The hijinks and gags worked like a well-oiled machine, never a hitch. This farce is particularly endearing if you know Noel Coward’s “Private Lives”. Bitter-sweet references to Coward’s play keep it grounded in some kind of reality which is lyrical. I love a good gag. A gag well-executed is an artistic triumph.