C.M.
I'm pretty indifferent about Open houses. Being in the Mortgage business for over 10 yrs, I have seen them generate buyers for someone else's house. Most of the agents I work with just do them either out of appeasing the seller, or to generate buyers (even if its not for your house).
I lived in the M-streets (Lower Greenville) for a number of years and always did an Open House for a rental property I own there. I always get a lot of applications, but that is a TOTALLY different kind of market.
Ultimately, price will sell any house.