On one of your previous answers you posted a piece from the Cancer Society talking about cancer and alcohol.
Alcohol can definitely lead to the development of cancer, particularly in smokers.
Alcohol and tobacco work synergistically. What this means is that if tobacco increases the cancer risk somewhat, and alcohol increases it somewhat, then the combination of the two tremendously increases the cancer risk. The cancer which is most associated with alcohol is cancer of the head and neck. The cancer which is most associated with smoking is cancer of the lung. As for whether or not you should give up alcohol, I would NOT recommend wide-scale abstention of alcohol.