I was worried about this as well but now have made a few sober friends who are also football fans so they'll be my go-to during football season.
Unfortunately, I live in DC and am a Philadelphia fan (yes, I know...boo, hiss) and our opener is against the Redskins. Luckily, I have a meeting that night so will be occupied with that for part of the game. Unluckily, I still have not learned to keep my mouth shut so made a bet with a Redskins fan and will likely have RGIII as my FB profile picture if the Eagles lose.
Oh well...
But I agree on the flavored seltzer although I still drink Diet Coke by the gallon. One bad habit at a time