Heading to my first Mason game since 2007 (I'm a vcu fan, but from up here). Generally root for Mason to do well, so I don't bombard this board when we play. Old Army buddy and I are getting together for this, I see there's set tailgate dates and this is not listed. Best bet for pre-game is Brions? Probably end up there afterwards to watch the Vikings/Saints game afterwards. I wish the VFW post was a little closer, but it's an early tip off regardless.
You seem too kind for a vcu fan, lol. Anyway, if you want pregame food/drink there is university mall. If you want to get looks from Mason fans who generally dont like seeing vcu fans, go to Brion's. But if you don't start anything and be friendly you'll be fine, which judging from your post you seem fine. Brion's directly supports Mason athletics.
There are other options in University Mall as well, but your best "pregame atmosphere" is Brion's. I know someone suggested Oh George, but a few of us haven't had such great experiences there and I am not sure that they directly give back to athletics.
You'll see that Mason has definitely upgraded Eaglebank Arena. The food selection is better, the lights go off during introductions and the general gameday experience inside the arena is better.