Character singing.
A man sings.  He is not a singer.  In fact, he sings terribly but he likes to sing and he does with enthusiasm.  He's not embarrassed by his lack of singing ability.  He doesn't care about his wife's reactions either.  He just sings from his heart and doesn't give a damn about the rest of the world.
For instance, Jack Nicholson in Heartburn.

https://www.youtube.com/watch?v=bqKrFhiJocQ

Employers get a free lunch out of you, and more than that.

Working on weekends
for no extra pay,
feels like quite the end,
effort without pay,

"Job basis", "exempt" or some other kind of BS.  It means working overtime without getting paid for overtime.  It works that way.  They classify your job as managerial even if you don't manage anybody or they argue that you're getting paid too much to "deserve" overtime pay.  It's unfair.  It's demeaning.  It insults your intelligence. But it's legal illegal.  The law is wrong,  The law allows employers to squeeze all the juice they can out of you and then throw you away, like you'd to with a lemon.