The picketers marching in a circle in front of a downtown Washington office building chanting about low wages do not seem fully focused on their message. Many have arrived with large suitcases or bags holding their belongings, which they keep in sight. Several are smoking cigarettes. One works a crossword puzzle. Another bangs a tambourine, while several drum on large white buckets. Some of the men walking the line call out to passing women, "Hey, baby." A few picketers gyrate and dance while chanting: "What do we want? Fair wages. When do we want them? Now." Although their placards identify...