Getting a person drunk in order to have sex with them is a crime in my jurisdiction because drunk people are not legally able to consent ("I was drunk too" is not a valid defense, either, fyi). If I could make the case that the person in question were plying me with alcohol in order to have sex with me that would be textbook attempted rape. It's a big "if", making the case, because the case is hypothetical and so is the evidence. But if the hypothetical PUA in question attempted to give me the impression that he was drinking as well while arranging with the bartender to maintain his mental faculties, that would be quite incriminating, and would show pre-meditation.

In any case it's a good idea for potential 'pick up artists' to know that in many areas having sex with drunk people in rape, and they should maybe just work on improving their ability to gauge which people would be likely to consent to having sex with them while they are still in possession of their faculty to consent.

(And no, in my jurisdiction it is not legal to bet on the outcome of a legal proceeding, but it is not illegal to suggest it, so we'll let it slide.)