I was a bartender/bar manager. This guy came in one night and said he was an aspiring DJ and asked if we would consider hiring him to come in just on Sunday nights to DJ for us. He said we wouldn’t have to pay him at first, he would just take tips and we could renegotiate after he helped to build up our Sunday night crowd.
He lasted less than 3 months. He drove away so much business and I got SO many complaints. He played the same songs every week and when people made requests (for commonly known songs), he had no idea who they (the musicians) were.
I had to fire someone who was working for free. He was a nice guy, which is the only reason he lasted as long as he did.