Basically, Pickles Pub is The place that a LOT of Oriole fans stop at to drink before entering the Ballpark. It is a very popular spot.
The rest of the time, it's a rather quite bar.
I've personally been there once (when it was quite), and while I don't have any major complaints, there was nothing really fantastic about it.
The Orioles will be out of town during Bronycon weekend, so if you do decide to go you won't have the drunk masses to contend with.