It still can be a little chilly at night these days, but light poles on Christopher St. between Bleecker and Hudson Sts. are keeping toasty in some new “sweaters” someone recently put around them. The one outside a barber shop, fittingly, is red, white and blue, which are often the colors on barber poles (though some are just red and white). One a bit farther down the block is more elaborate, sporting roses that are entwined around the tree’s branches.