OK another opinion...
I have a drink or two every now and then.  Dr said as long as I wasn't excessive it should be cool.  Fairly certain my cancer came from smoking 2 pks a day for a few years, unhealthy eating habits, and there is a significant history of cancer in my family.  
I try to eat better and reduce the overall amount of toxins I expose myself too, but I think an adult beverage every now and then is OK..  Provided it doesn't irritate things in your mouth.    
tim