I asked my transplant co ordinator that exact question.And his response was that theres nothing wrong with a afew drinks while im listed, just as long as i dont go silly with it.He said i might as well enjoy it while i can, cos after transplant i wont be able to do it. My advice would be that you cant put your life on hold. Everything in moderation is ok. And dont let it be a thing you do often.
Think opinion will vary,depending on who you ask.
take care, Nic xx