When he's gone, she does a crowd-scan. If there were visible logos on the clothes these people are wearing, she'd be in trouble. Lots of Prada, Gucci, but in a Moneyed Bohemian modality too off-the-shelf for London or New York. LA, she realizes: except for two goth girls in black brocade, and a boy gotten up in impeccable High Grunge, it's