No idea about hotels in Baltimore. Growing up around DC as I did I never really had much occasion to need a hotel in Baltimore. If I went up there I just crashed at friends' houses. But with a little bit of looking, it appears the Radisson Plaza Lord Baltimore is like 7 blocks from that address and is approximately $139 a night.

More info about that Sonar place: http://www.baltimoresun.com/entertai...,6359186.venue

I honestly could not ever be convinced to give half a fuck about your DJ guy so I'm not watching that video, but it may very well be more convenient to rent a car and drive up to Baltimore then drive back to DC that night, unless you're planning to get blitzed at that club place.