One place I worked, I refused to work overtime.* I relented twice
The first time during a normal week(Monday - Friday), they stopped the overtime the next day.
The second time it was working on a Saturday. The same day the place burned to the ground.**
**The following two weeks saw 99 hour weeks done(Not including breaks), and down into 80+ hours by the months end.
*Time and a third wasn't worth what they were paying, nor expecting for the extra third.