I don't care if they come.  The HOB is just another place for shows.  I love the 9:30 and always hope the bands I want to see end up going there, but I've been to HOB and as far as I'm concerned, a good club show is a good club show no matter where it is.  Yea, its cheesy-looking, but who cares once the band comes on.  If the beer prices are OK, the view of the stage is clear, and the sound is good, I'll go to a show anywhere.  A DC HOB would likely be similar to the 9:30 (I'm guessing - HOB are different sizes from city to city) except with a flashy interior and a not-as-cool staff.  But that wouldn't stop me from seeing a great band there.