Fredrick md isn't to far and probably your best bet in the artsy world. I'm new to the area too so sorry I can't be of more help.
There are going to be two venues on Saturday night that will play music amenible to swing/ blues dancing (I think) in the Sheperdstown/ Charlestown area. I'm going to go to at least one of them. One is free and one is $5. If anyone wants to go (especially someone who would be interested in being a dance partner), shoot me a message.