I will add alcohol is hard in WHOLE body. Your workouts suffer even if you drink fri/sat and don't train until Monday, full of empty calories, puts stress on yoru organs, even more so. Might not seem to bad if your young but it's taking a tole on your body. Your body will only take so much for so long. Having said that, a drink or two or few drinks once in a while is OK, but every weekend all weekend will catch up with you, maybe never need a new liver or anything but your workouts and results will sufer.