I get $13/hour during weekdays and $20/hour during weekends. However, the waging system seems to be different here in Iceland then in the US, because no one would settle for $8 an hour!
When I started out in the coffee business I was 17 and got paid $9/hour during weekdays and $11/hour on weekends.
My wages when I was starting out were almost the lowest legal wage people can offer. I know that some get more the $20 during daytime hours, but that's because they are older (age has a lot to do when it comes to calcutaing wages).