The 70, 79, 64, G8 and P6 bus lines all have bus stops within a few blocks of the Walter E. Washington Convention Center. If you don’t mind walking a little, these may be good options to get to Awesome Con. You can find more out about bus service on the WMATA website.
The Georgetown-Union Station DC Circulator Bus also has stops close to the convention center at 9th Street and New York Ave NW and Massachusetts Ave and 7th Street NW. For more information on the DC Circulator, please visit their website.