Alcohol interferes with sugar metabolism in the liver, so it interrupts glycogen synthesis, which is critical for optimal recovery after exercise.
Remember that alcohol is a diuretic agent (promotes water loss), so it can promote dehydration and thus may impair heat tolerance and temperature regulation. Alcohol tolerance, drinking experience, environmental temperature and hydration level can affect the body's response to alcohol at rest and during exercise.
My advise is that hardcore athletes or people who wants to keep their abs, minimize their alcohol consumption. It promotes fat deposition, which means bye bye 6 pack.