Atrium is a vast shop we've never really understoodait looks cheap, but it carries expensive merchandise. (You wouldn't expect to find a denim jacket from See by Chloe, but here it is, marked down to $229 from $550.) Today the whole store is given over to a sale, and the racks are organized by price, an innovation we heartily approve of. Though the management is maddeningly vague about how long this sale will go on, we suspect that if you hurry you will still find items like a cabled brown muffler with pink fringe, marked down from $62 to $9. With its bohemian jauntiness and street-cred label (Triple Five Soul), it manages to flirt with the spirit of the oldaand the newaBleecker Street.