Had a front man about 13 years ago who would get hammered before during and after gigs. One night he started verbally abusing the audience. We pulled a "rock n roll intervention" on him. He was no longer allowed to start drinking before the third set.
This is a business for me. Yes I love to play. Yes I'm good at it...but professionals drink and drug on their own time.
In the early 2000s, I worked for a North Carolina blues artist, name redacted to protect the guilty: We'd get through the first set, and he'd go out into the parking lot or wherever with his buddies and drink cognac and smoke weed. Then he'd get back on stage too wasted to do anything, and ask me to sing. Several times, I pointed out to him that the audience had come to hear him sing, not me. He never understood that he was supposed to be the entertainer at the party, not a participant.
The other thing he'd do, when he was really lit, was to put his arm around me and say "I want you to be my musical director!" Fortunately, I had heard from former bandmembers that the name they used behind his back was "B.B. Amin." So I knew not to take him seriously.
Was there an upside? Yeah. He always paid me fairly. I lasted a year.