I consider it somewhat like a bell curve. For those that drink during league on a regular basis, their performance generally goes up after the first drink or 2 "to take the edge off". Bowling is alot of muscle memory, so being in the same state of mind is important. The problem is finding the continued state of mind at the peak, before you start falling down the other side of the curve. So too many drinks is bad for performance, but if thats your thing, have fun and be safe. Afterall, most people aren't bowling league for the money, it's for the fun.