The Back Bay’s most ardent oyster lovers can swing by the bar at Bar Boulud Monday through Friday to satisfy their weekday cravings. The treats-from-the-deep (in this case, wild-caught Duxbury oysters) will be available for $1 each between 4:00 and 6:00pm. The Mandarin Oriental’s signature restaurant even sweetens the deal with $3 beers (specifically, Jack’s Abby Framingham Lager). Call 617.535.8800 or just go home by way of Boylston Street and drop by.