I don't think the arguments about "keeping sober, keeping safe" are correct. By teaching girls to do this you are teaching boys that drunk girls are fair game.
The first time I was raped I was drunk, it was someone (older, I was 17) from work. I snogged him, he had nowhere to stay, I said he could crash with me, I told him explicitly that I did not want to have sex with him and that it was only a place to sleep. I woke up with him raping me. My mistake was not being drunk, it was trusting him not to rape me while I was drunk. If I was sober I would have made the same decision because I knew him from work and felt bad that he couldn't get home.
The second time I was raped was when I was homeless. I used to hang out in bars and try to find men who I could crash with, one of them felt I "owed him", again I was drunk, I half knew it might happen, I really needed somewhere to stay. I didn't know what else to do.
The third time I was staying with someone regularly, sleeping with him periodically, I was seeing him, I liked him, he was a violent alcoholic, he raped me while he was drunk, I was sober, he went unconscious half way through and I had to push him off me. Again I had nowhere to go.
The fourth time I had discovered my XP was cheating (again) and refused to have sex with him, he raped me, I was sober. I got pregnant. Again trust.
Alcohol is not the issue. It is trust as garlic says. Men that rape women they have been drinking with have often been buying the drinks too. They put work into the trust, they are manipulative and entitled.