How Do I Disable Popup In Apps Asking If I Want To Login To Facebook?

I logged in to Facebook through my app once and didn't like the results. So, I stopped it (can't remember how). Anyway, now all my Zynga "With Friends" games (Chess, Words, Matching, etc.) always have a popup when I launch the game saying Zynga "noticed" I had logged on to Facebook once before and do I want to do it again. No. No, Zyga, I don't. Now that I've pressed the "No Thanks" button several dozen times, how do I permanently tell it "no" so that it stops asking me over and over again? I'm now regretting having ever logged in to Facebook using these products.