One of my go-to agencies has a weekend discount, but they don't advertise it.  I also read a recent review of another agency I've gone to where a reference was made to the weekend discount (I did not know about this one so I have apparently been overpaying)....in short, they appear to be rarely advertised.  I'd appreciate if anyone who knows of unadvertised specials, please PM me with details.  If nothing else, I'd rather tip the girl the difference.