Wendy Wasserstein's "Isn't It Romantic" … could, in a sense, be considered a sequel to her "Uncommon Women and Others," of several years ago. "Uncommon Women" was a glorious comedy, with an undercurrent of satiric rage that held it taut…. "Isn't It Romantic" is about Janie Blumberg and her Gentile best friend and private-school and college classmate Harriet Cornwall, both of them aged twenty-eight and unmarried, and about their mothers, and about the men they see and sleep with and consider and discuss, and about the loving tie of best-friendship between women…. It is Janie, though, whose story is being told—a witty, original, overweight Jewish heroine whose life has come to a stop, and this time the undercurrent is of sadness, perplexity, and rootlessness. Janie simply cannot make a move without being pushed, and when at last the doctor she is in love with, sort of, tries to...