I was in a work environment that included a lot of drinking among my circle of peers, and that was a really bad environment for me. I didn't quit when I could have, should have, and I suffered the loss of several contracts and ultimately a career. I hope that you are able to simply say "no, thank you" to those opportunities that will only harm you.
You've received really good insights here in how to handle things, and I'm pulling for you, too.