Peabody Heights brews great beers (whether it's one of theirs or another brand's), has great indoor and outdoor spaces, and friendly helpful staff. It's also located on the site of one of the old Oriole Parks so there is a ton of baseball history there, as well. Overall, it's my favorite brewery in Baltimore.
Just tried the Thirstay American Pale Ale. It is a wonderfully crafted ale with just the right amount of citrus to compliment the abundance of hops. I will be buying more on my way home from work today!