I think having alcohol hidden in your стол письменный, стол at work is probably a sign of alcoholism, but I know I still Любовь her as a character despite her vices.
I don't think she is. Her father was and she's afraid of becoming one. The alcohol in her стол письменный, стол was tequila. Her and bosco used to take текила shots when they closed a case.
I don't think Lisbon is an alcoholic because we have never seen her drunk. Most alcoholics are drunk for a good bit of the time, and we have never seen Lisbon drunk. Who knows, maybe she wasn't trying to hide the alcohal in her desk, maybe she just has a shot once they close a case. It never implied that she was trying to hide it. I think if she was, we would know and not have to guess.