It’s December, and 80 degrees. Lovely. If you can’t beat them, well then, dress for the occasion. Calypso’s bohemian-glam style is perfect for Miami’s faux winter, and today from 6 p.m. to 9 p.m. its Bal Harbour location is offering 25 percent off your entire purchase. Pick up a lightweight darshini sweater, a long-sleeved tunic in winter blue or a pair of sequin cocktail shorts. What about boots? You can blame global warming for that one.