Baltimore...private party room
I had a 30-person private party in the upstairs room at Max's on Broadway (http://www.maxs.com/). We had the whole room to ourselves, they let you control the music if you want (or use satellite), and have AV equipment in case anyone wants to create a slideshow. They work with you on menu (typically you give them an idea of amount of money per person then you work together to figure out food options). Having the whole upstairs was great and gave the party a fun feel - plus, they have a bartender upstairs as well. Casual, but fun!
Max's On Broadway
735 S Broadway, Baltimore, MD 21231
We were just at the Gin Mill in Canton, and they've done a really nice job of re-doing the place (last Fall?). There is a whole upstairs area that it might be worth asking if they would close off for a private party. Other places with upstairs that might do the same - Red Star (Fells), Waterfront (Fells), and Geckos (between Fells and Canton).
2318 Fleet St, Baltimore, MD 21224
2300 Boston St, Baltimore, MD 21224
1710 Thames St, Baltimore, MD 21231
The Red Star Bar & Grill
906 S Wolfe St, Baltimore, MD 21231