The Flagship Lounge is the better lounge (though arguably the worst Flagship in the US network), it is a bit hidden, at the end of the K pier and slightly tucked back, you may need to hunt for it. It is open from 6 30 am (bit late by US standards) until 22 hrs. It does food. It's not that far from the larger but less sumptious Admirals Lounge, which benefits from a more central location between two of the main piers, H and K. There's a smaller Admirals lounge near G8, best avoided. Admirals lounge has basic snacks and drinks for free, a pay bar with more exotic food and drink, and as Gold you should get 2drinks vouchers.