What would be the negative health effects on one's body from drinking two bottles of wine per week?

One of my former co-workers came to visit me today and we have both had weight loss surgery. He told me he is drinking two bottles of wine per week (weekend nights) now so he is no longer losing weight. I was speculating (along with a third friend) about the negative effects this would have on a person’s health. I said it can’t be good for your liver, but he pointed out that the amount he is drinking is no different than if someone had two glasses of wine per day, which, he has a point.

I am not a drinker, really, but I do know if I drink a few drinks at a wedding or something I can easily gain a pound the next day.

What would be the negative effects of two bottles of wine per week on a person’s body?