Old idea...
...There was a Chevy dealership in St. Louis that ran a 24-hr. shop where I took my Z-24 in for work. This was back in 1988 and I'm sure they had started that service much earlier than that.
I once brought the car in around 11:30 after working a late IS shift, and got it back by 7AM the next morning.
As many service backlogs I see at shops, I wonder why MORE places haven't done the same?