The trendy, elegant vibe, and the creative and inexpensive menu of unique salads and tapas (try the bomba, a potato filled with meat or vegetables in a spinach sauce, or the huge meat and vegetable brochettas) draw a stylish young crowd. The original Malasaña location offers a breakfast menu during the week, and a smaller lunch and dinner menu. The newer, bigger, and more sophisticated Plaza de la Paja location opens only on the weekends for breakfast and has a more expansive menu; it also has a cocktail lounge, with a DJ, that's open Thursday through Saturday nights and Sunday afternoon. Show up early or expect to wait. Reservations not accepted. Other location: Costanilla de San Andres 12, (Plaza de la Paja), La Latina, Madrid, Spain, PHONE:91/354-0255.