Yeah birthday cake is cool, but have you ever had a whole (free) lobster instead? Calling all September babies, Summer Shack is shellebrating this month’s birthdays with a free one pound lobster. Book a reservation and head to either Shack location (Cambridge or Back Bay) and swap out your usual bday cake for a complimentary lobster. The special offer is available through Monday, September 30th for dine-in only on the day of your birthday with proof of ID, so make sure to plan accordingly and let all your fellow Virgos (and a few Libras, too) know.