In the battle to rule the drive-thru, the best weapon is smoke. A rich, heavy cloud of it floats across Washington Avenue every afternoon from El Rey, a small Cuban/Mexican restaurant that attracts a fleet of loyal subjects. They come for the chicken, which is skewered and baked for hours to golden perfection. On the side, red and green salsas add a layer of punch to the meat's roasted, marinated flavor. The chicken also fills sandwiches, tacos, burritos and terrific tortilla soup garnished with cheese and avocados. Take it all home along with some Cuban-style fried plantains and a Mexican-style cantaloupe-juice agua fresca. Now that's living like a king.