More about the location: I too wouldn't call this West End, which I consider to be the area around the Park Hyatt. To me, 22nd and M is just a a commercial area, arguably around the far (western) end of the M Street downtown office area populated with private firms (consulting, law, etc.) rather than government buildings. If you walk (south) toward Washington Circle, there are some nice apartment and condo buildings, so that the area becomes more residential. There's also the GW Hospital area before you get to the Foggy Bottom Metro Station.

BTW, I too remember eating in Blackie's but I was never aware of the INS raids.

Also BTW, IIRC there's a conference center with hotel on the Georgetown campus which I thought was operated by Marriott, but I suspect it might not be open to reservations from the general public. When I first saw the thread title about a Georgetown Marriott, I assumed that it was this property and not the downtown full service Marriott.