Hi,
I used to live in Reston, VA. I think one good resource for you might be the Institute for Spiritual Develpment. Their website is: . They do all sorts of interesting stuff, like metaphysical fairs and various types of healing circles. At the very least, they might be able to put you in touch with other reiki groups.
You also may want to try to get in touch with the owner of a store called Woman's Wish.... She teaches reiki in the Occquan area, so she may have an idea of any reiki groups.
Good luck to you!
Namaste,
Nicole
