Either 3 things happened which are all bad for Lloyd but equally likely.
1. He just wasn't funny. Like at all. He totally bombed and then he rage quit or they gave him some excuse about why he couldn't go on again.
2. He said something inappropriate to one of the comedians and they told him he couldn't go again.
3. Someone googled him or others contacted the people putting on the show and told him he couldn't go on again.
The same thing will happen if he gets past open mic nights. He isn't talented or good-looking enough for people to turn the other way when he eventually sabotages himself.