Give the gift that keeps on giving – this December, when you purchase $100 in gift cards to any of the Aquitaine Groups’ restaurants, you’ll get a free $20 meal certificate. All you’ve got to do is pick which of their delicious spots you want – Aquitaine, Aquitaine Bis, Aquitaine Dedham, Gaslight, Metropolis, Greenlight, Union and newbie Cinquecento – and you’re well on your way to free fine dining. Pick up a few for friends, family or co-workers this holiday season – the promotion is only good through December 31st (with meal certificates valid after January 1st, 2013).