http://www.superpages.com/yellowpages/C-Mosques/S-DC/T-Washington/
There are only 6 mosque's or mosque-like?? places in D.C.
Am I missing something??
That is just in the city. You also have to consider in the Arlington/Alexandria suburbs (where the Pentagon is), Falls Church, Fairfax County, Montgomery County, Prince George’s County, etc
And that yellow pages listing is not complete. Its missing quite a few