If you forget your ID, then why go out of your way to go to some crappy pub? (and let's face it, the one's who don't ID those who look underage, aren't worth drinking in). If you don't want to be IDed because you don't have ID - go to your JCR bar, they never ID. And even if they do, you can prove you are a uni student. Just take your ID with you, and then you can drink where you (and your friends) choose to.