Man, I wish I could take you to some beer bars so we could see if you really hate beer, or if you've just had bad ones. A friend of mine was positive that she hated beer; then I introduced her to gueuze and now it's gotten to the point that she's planning a trip to Belgium to drink more of it. By chance did all three of the ones you've tasted have Bud, Miller, or Coors anywhere in the name?
Nope. As i wrote above, I've actually had more than 3 when counting small samples/swigs over the years ("here, try some of this"). Had UK lagers and ales, ciders (closest to something I could actually have more of), a couple types of german beers, a couple of 'micro brew' things from breweries local to wherever I was living at the time, etc.
Just... ugh. Can't do it. And honestly, if it was a case of "just try XYZ a few more times"... I'm not sure if I want to get accustomed to something that's $6/ bottle, which would end up adding $12-$20 per meal I go out for. I'd rather be able to leave a large tip if I've enjoyed the meal than pay for expensive bottles of 'the good stuff'.
I most social situations, I'm driving anyway, so it's always easier to bow out and grab a ginger ale or something, if I'm heading to the car in an hour.
When I'm not driving someplace (hotel for a conference, etc), it's tastier to get a fuzzy navel or some other fruity drink with some alcohol in it :)