Cold? We’ve got three ways for you to warm up this week, and they’re all at one event. On Thursday, The Third Piece, a Boston-based knitwear line that makes the softest scarves, turbans and hoods ever (we’ve felt them), is hosting a trunk show and wine tasting at Bar Method on Clarendon St. Take a bar class, buy a scarf, have a glass of wine. See? Warmth, three ways.