If you have any AMEX card, you can get into the Centurion lounge for $50 (AMEX Platinum will get you in for free). I'd suggest that one.
Also, gates can and do change. If you're on AA mainline, there's no way to tell which gate your flights will actually use as AA operates from A/C/D. US operates from E, and Eagle from B (except for Eagle international, which will usually use D).
Last edited by aamilesslave; Jun 10, 2015 at 9:20 am