If after you've attempted to get a conversation going the other person really doesn't seem to want to talk, then don't take it personally.
If you see the other person's eyes glaze, notice rigor mortis setting in, or suspect they may be doing a closed-mouth, face-expanding yawn, you might just be committing slow boredom homicide. People appreciate humour (and if they don't, maybe you need to be talking to someone else).
The problem being that when we drink, we forget the law of diminishing returns.
Beyond a certain point (which can be reached with just a glass or two), yet more booze will not make you more socially adept - quite the reverse.
Use self-hypnosis to visualize (and so instil the pattern in your mind of) yourself being calm, relaxed, friendly, and coherent when approaching new people.
I'll tell you what, as it's you, why not listen to this free audio session for a taste of how effective these kinds of psychological prepping exercises can be?
Many of them believe cybersex to be similar to pornography—an extension of fantasy that actually helps to keep them from physical affairs with other people.