There are several clubs around here. I am sure none of them are dedicated to satellites but I am sure you can find people within them that enjoy them. Two that come to mind are:
The NVFMA: 146.79, 146.91, 447.025 (PL 100)
GMRA: 146.88, 146.61
There's also the Mount Vernon Amateur Radio Club and the Alexandria radio club. There are tons of them around here!
Like I said, I am pretty positive that most of them are not dedicated to satellites. If you ask around you should be able to find someone that is and maybe even a small club that I failed to mention.
Hope this helps!
Peter B. KG4IVT
Great Falls, Va.