Cask Condition Beer/Ale In Baltimore and Maryland

I found this thread on ChowHound discussing where to find Cask Conditioned (among many other names ... not sure yet who will win out in the zeitgeist) beer in Baltimore --- and by extension the state of Maryland.

Some obvious names come up: Oliver's/The Wharf Rat (in particular), Max's has a beer engine or two, Frisco Grille has a beer engine that usually has something on, Bertha's carries an in-house "Bertha's Best Bitter" made by Oliver's, Mahaffey's has a beer engine, the recently burned Metropolitan Coffeehouse and Grand Cru which I haven't visited.

Much like the Firkin Friday event at DuClaw (who also produces occasional cask beers but doesn't have a regular cask selection or hand pump), there are Firkin events at Grand Cru according to this thread (every Thursday) and Metropolitan Coffeehouse (if they've returned, their events were last on Thursday nights).

The thread also mentions Red Brick Station which "has [periodic] casks of their beer".

Are there others, because that just about covers it from my experience?

Update: While writing the very next entry, I stumbled across the page for Frederick's "Barley and Hops" and they advertise having cask conditioned beers on sale (I assume seasonally). Nice.

Update: Add Growlers of Gaithersburg, as well. We love our beer engines out here, huh?

Update: Add Johansson's (in Westminster). I just made a trip up there and they had four engines (only one was in use at the time).

Update: Add Brewer's Alley in Frederick. They have at least one beer engine I saw on a recent visit.