Circuit City (IS) Unionized
That article above is a must read for the commenter who said "Circuit City isn't unionized."
AFL-CIO had at least indirect influence with Circuit City and union style gatherings/picketing did take place in stores in 2007.
Here's another link:
Look below.. Links don't work but the provide a showing of AFL-CIO Unionized Protests at various Circuit City stores regarding Worker Pay.