Serious Comedy / Castin: 7f. with doubling / Ints. Marlene has been promoted to managing director of a London employment agency and is celebrating. The symbolic luncheon is attended by women in legend or history who offer perspectives on maternity and ambition. In a time warp, these ladies are also her co workers, clients and relatives. Marlene, like her famous guests, has had to pay a price to ascend from proletarian roots to the executive suite: she has become, figuratively speaking, a male