Dance Floor DemocracyOpen from 1942 until 1945, the Hollywood Canteen was the most famous of the patriotic home front nightclubs where civilian hostesses jitterbugged with enlisted men of the Allied Nations. Since the opening night, when the crowds were so thick that Bette Davis had to enter through the bathroom window to give her welcome speech, the storied dance floor where movie stars danced with soldiers has been the subject of much U. S. nostalgia about the "Greatest