The laws are only considered binding if you decide to submit yourself to them. You can mostly pick and chose as long as you haven't yet committed yourself to it and unlike most other religions you're explicitly told only to commit yourself if you feel that you are ready and able to.

At least that's my understanding of it. And it's not like there aren't ("faithful") Muslims who drink.

If that's your biggest problem with Sikhs, then Sikhism sounds pretty darn good.