A forever work in progress

"Hi I'm Marty and this is my first time. I'm a gambling addict." From the sea of faces sat in front of me comes no reply until finally one voice said "Hi Marty," then another and another. Jokes are never funny if you have to explain them so better get cracking here my man I think to myself. Picking on the first man who replied I point to him and ask "what's your poison?"  "Oh I'm an alcoholic myself," he replies in earnest.  "The lady sat to the man's right. Yes you, could you just smell the clear liquid in his glass for me?" Amazingly she duly obliges. "It's OK it's just water," she shouts back and the room laughs at her. Well at least someone's getting a laugh.  "Thank you. Well done you Sir, keep it up." He puts his thumb up and smiles.  "Right let's try that again people's. Clearly you're a better class of guest than I was expecting. At addicts meetings when I say...