Some encounters may take longer than their allotted times, while others may take less than the time allowed. It is NOT necessary to use the allotted time for any particular encounter if you are coding based on the documentation of the three key components. In other words you are not penalized for being efficient.
If you are only going to have 1-2 drinks, you should be fine to breastfeed. If you are going to binge drink, then you should wait two hours per drink before breastfeeding. Once the alcohol is out of your blood it is out of your milk. And pumping & dumping does nothing to speed this process up.
The fresher the beer, the better it is. Beer is like bread in that way. A keg should be kept cold and under pressure and drunk within 4 months of being kegged at the brewery. So, if you by a keg that is two months old, you should consume it in two months at the most. Kegs at my house hardly ever see one month. BTW, keep your lines clean, or he beer will start to suck.